Guide:Arena

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Note: Most of the arena designs that are listed below have to be edited in their respective Terrain Preparation sections of their guide, as they are transcluded from these pages.

An Arena is generally an area that the player builds where they can face a Boss or other significant challenge more easily. Each arena can be different for each boss, some consisting of a flat area or multiple layers of Platforms supported with Statues.

General Arenas

  • An arena is better built away from Bases so NPCs won't get hurt or killed. It's better built near the ground, far from Space so there won't be any unwanted HarpyHarpy or WyvernWyvern spawns during an important fight.
  • A typical arena usually consists of multiple long rows of Wood PlatformWood Platforms, or a flat surface on the ground or the air made out of Asphalt BlockAsphalt Blocks to greatly increase running speed.
  • Sometimes, the shape of the arena depends on the Boss or Event and how the player decides to fight it. Dart TrapTraps and Lava BucketLava can be used to easily kill enemies from Events, while certain bosses like King Slime lack the ability to attack through solid blocks (although as of update 1.3.0.1, King Slime will teleport directly to the player if he gets stuck on blocks).
  • Placing CampfireCampfires, Heart LanternHeart Lanterns, Honey BucketHoney placed in BubbleBubbles(Desktop, Console and Mobile versions) and Heart StatueHeart Statues will greatly increase Health regeneration in battle. A Mage may also want to place Star in a BottleStars in a Bottle and Star StatueStar Statues to regain Mana more easily.
  • SunflowerSunflowers reduce enemy spawn rate and increase movement speed.
  • Peace CandlePeace Candles(Desktop, Console and Mobile versions) reduce enemy spawn rate, which may help on bigger arenas - however, in many scenarios such as farming events, an increased spawn rate is more favorable.
  • Water CandleWater Candles increase enemy spawn rate, which will help when fighting timed events such as the Pumpkin Moon - keep in mind, though, that fighting bosses or untimed events will be more difficult.
  • You can build a house for your NurseNurse NPC near your arena. The House should have a BedBed, so in the middle of the battle you can use a Magic MirrorMagic Mirror or Recall PotionRecall Potions to visit the Nurse and get instant healing. The house is better built away from the arena to prevent the Nurse from being killed.
  • A Bast StatueBast Statue(Desktop, Console and Mobile versions) can be used to increase defense of nearby players. It is found in the underground desert, or in Oasis and Mirage Crates fished up in the desert.
  • (Desktop, Console and Mobile versions) In 1.4, since luck increases damage, it's helpful to place luck increasing items like Garden GnomeGarden Gnomes, and the corresponding biome's Torches if in the underground or below.
  • Once you have killed a Mechanical Boss and had the SteampunkerSteampunker move in, you can buy and use TeleporterTeleporters to devastating effect. When wired to a Gray Pressure PlatePressure Plate placed above them, you can instantly transport across the arena as soon as you walk on them, greatly increasing mobility. They could also, alternatively, be used to teleport to the Nurse, heal up, and quickly return to the arena. (Desktop, Console and Mobile versions) In 1.4.4, TeleporterTeleporters are now bought from the MechanicMechanic, making them available once Skeletron has been defeated.

Advanced Arenas

  • If using the Nurse is something that you are planning to do, create a three block high valid NPC house directly underneath your arena and move in the Nurse. This way, you can still right-click her easily since she is right underneath you and still run right by without having to enter a building that could trap you.
  • Try building your arena so the center is at your natural world spawn, that way if an event occurs you can easily teleport there by unsetting your spawn point from your bed and using a Magic Mirror or Recall Potion. You will teleport directly to the arena so you can get in the fight right away, and if you die you will respawn right there again. Try combining this with the above strategy so you can respawn after death right at the Nurse to heal yourself the rest of the way.
  • If you are going to be moving the Nurse into your arena, it is a good idea to move the Arms Dealer into a nearby or adjacent house so the Nurse will be happy. This way, healing from the Nurse will cost much less than if she was alone, and you can easily buy more ammunition from the Arms Dealer if you run out.

Bosses

King Slime

This content is transcluded from Guide:King Slime strategies.King Slime is one of the few bosses in the game that lack the ability to go through blocks. This can be exploited as follows:

  • Make one or two platforms above the ground; King Slime will eventually teleport to ground level and the player can easily hit him from the platforms. If he moves to the upper platforms, falling down for a brief time before jumping back up will cause him to fall down as well.

It is possible to exploit the King Slime's large size in Old-gen console version Old-gen console and 3DSNintendo 3DS version versions by making him stuck in-between blocks.

Eye of Cthulhu

This content is transcluded from Guide:Eye of Cthulhu strategies.

A basic arena made for the Eye of Cthulhu.

An arena for the Eye of Cthulhu should be large enough to dodge and maneuver around in. The recommended size is just about the size of the screen, as the boss does not require a lot of mobility.

The simplest arena design consists of multiple rows of wooden platforms to have more room to jump and dodge. As the fight will be at night, add torches to improve visibility. Remember to adjust the distance between platforms depending on your jump height (this is 6 tiles at minimum, depending on which accessories you have), and consider placing some ladders (with platforms or rope) to aid your vertical movement.

Another design is a long, completely flat surface. This allows you to dodge the Eye by running to the left or the right with Swiftness Potions or Hermes Boots.

One of the easiest ways to defeat the Eye is a long, stretch of sand paired with Dunerider BootsDunerider Boots(Desktop, Console and Mobile versions). Due to the speed boost gained on sand, it can be used as a surefire way to make dodging the Eye incredibly easy, making the fight trivial itself.

Eater of Worlds

This content is transcluded from Guide:Eater of Worlds strategies.

Multiple platforms made for the Eater of Worlds fight.

The player must be in The Corruption to summon the Eater of Worlds; moving too far away from the biome during the battle will cause it to flee.

The Eater of Worlds is a very large Worm enemy, so dodging it may prove to be difficult. You may want to try fighting it on the surface instead of underground. If summoning this boss via breaking shadow orbs, be sure to provide yourself a quick and safe escape back to the surface where your arena will be. A room with a BedBed next to your arena can let you teleport there easily, but be careful that the path from orb to arena does not go through any non-Corrupted areas (lest the boss despawn). When making your arena on the surface, you have some options:

  • In Normal mode, make it fairly tall, thin, and easily climbable with many Platforms. That way, not only you can see it coming, but this will force it to climb in a relatively straight line, leaving large portions of its body exposed, and vulnerable to piercing attacks.
  • In Expert mode, due to the frequency of the Vile Spit attack, the Eater of Worlds will become much harder to dodge. Arenas built on the surface make dodging the attacks easier, but they come at the cost of increased movement and attack speed from the boss. Multiple wide platforms are normally sufficient for the fight, but you can enhance the arena by adding walls to prevent normal enemies from spawning.
  • Whichever option you choose, make sure the arena doesn't go too high. If it goes too high and the Corruption background disappears, the Eater of Worlds will start despawning.
  • It's also not recommended to build your surface arena above a valley. While it's still above the ground, the hills on either side will provide higher ground for the Eater of Worlds to get to you and make your arena less effective.
  • To not get interrupted by Eater of Souls, it's recommended to place an Eater of Soul Banner to minimize their damage. You can obtain one by killing 50 Eater of Souls.

If you don't want to fight it on the surface, it's alright to fight it underground instead. If you are breaking Shadow OrbShadow Orbs, hollowing out an entire arena every third orb or escaping to a surface arena may not be practical; you should modify the terrain around you to have a quick path of escape to a space with good horizontal clearance and any hazardous terrain smoothed out or boarded over. Consider placing platforms periodically to provide extra maneuverability.

Brain of Cthulhu

This content is transcluded from Guide:Brain of Cthulhu strategies.

Standard 5 layer arena.

Your arena will have to be built in The Crimson, because it can only be summoned there. Since the Brain of Cthulhu spawns as soon as you smash a third Crimson Heart, you're likely to be in a very enclosed area when the fight begins. This can lead to you being swarmed by the Creepers and getting overwhelmed. This can be avoided by preparing the chasm's main chamber as an arena beforehand, and choosing which Hearts to break first:

  • For the first two, pick the least convenient hearts (distant, above the main chamber, underwater, etc).
  • For the third, pick the closest to the main chamber, toss a Bomb or another explosive, and quickly go to your arena while it falls.

If you have access to the Dryad, purchase several stacks of Purification Powder and completely convert the main chamber so that there is no Crimstone Block exposed to air, which prevents you from needing to deal with other Crimson-based enemies during the fight, although standard Underground enemies may spawn in their place. Set up several rows of platforms all the way across the central chamber, close enough that you can jump up to the next platform, and light up everything.

If summoned with a Bloody Spine, then the arena can simply be made in the Surface, however, do not make it very tall, as jumping too far above it will be considered exiting the Crimson, causing the Brain of Cthulhu to despawn. If you have already prepared the central chamber as an arena for a prior fight, use the Bloody Spine there to avoid a despawn.

(Old-gen console and 3DS versions)The Brain Of Cthulhu is unique in the way it reacts when you die. Unlike every other boss, The Brain Of Cthulhu does not despawn upon your death, rather it keeps ramming into the spot you died. You can use this to your advantage by using Purification Powder to clear out a small area to make a basic house. Then if you place a bed inside, you have a respawn point in the main chamber. Now, there is virtually no consequence to dying in the fight, as you can keep respawning and continue the battle.

Queen Bee

This content is transcluded from Guide:Queen Bee strategies.Even if you summon the Queen Bee by breaking a Larva, you do not need to stay in the hive to fight it - you can get out of the hive and fight it in the wide-open areas of the Underground Jungle if you'd prefer. However, most Hives offer an easy arena: a decent amount of space is already carved out, and the pool of Honey at the bottom provides a health-regenerating buff which stacks with other buffs.

If you're fighting the Queen Bee in the hive, be mindful of the honey and water in the hive. They can be useful (such as using honey for regeneration) or interfere with the fight, such as removing the On Fire! debuff from Queen Bee if using a weapon that inflicts it. As with most bosses, Wood Platforms are vital. Having them every 5 blocks is an optimal height but if your jump height is boosted in some way, you can increase the number of spaces between platforms which can save you materials.

A rope can be used to dodge Queen Bee charges if sufficient movement accessories aren't available.

Solid blocks can help to block the stingers.

Skeletron

This content is transcluded from Guide:Skeletron strategies.

The entrance to the Dungeon can be easily adapted into an arena.

Warning: Don't make significant edits to the dungeon floor. Doing so can stop the Endgame Cultists from spawning, potentially blocking progression. Plan your arena above the Dungeon roof instead.

The entrance area to most dungeons can often be modified into a more desirable arena if needed. Most important is that you have room to dodge the hands, as well as enough vertical space to avoid getting trapped when Skeletron's head begins to spin.

Wall of Flesh

This content is transcluded from Guide:Wall of Flesh strategies.The Wall of Flesh benefits from having an arena prepared more than other bosses.

The simplest arena is a long bridge of about 750-1000 blocks with some space above it for the player to maneuver. This places the player out of danger from falling into lava and ensuring that they can keep a steady attacking pace allows the fight to be faster and easier. Note that Underworld map generation tends to place Ruined Houses towards the middle third of the map, leaving the eastern and western wings mostly clean for placing blocks.

However, one can skip the whole terrain preparation process by consuming Water Walking PotionWater Walking Potions or wearing Lava WadersLava Waders instead. In 1.4, the Terraspark BootsTerraspark Boots(Desktop, Console and Mobile versions) may be preferable. Do note that it is possible to get stuck behind ash mounds and houses, so it is recommended to mine or bomb problematic areas out while exploring the Underworld beforehand.

Alternatively, you can build the arena with Minecart TrackMinecart Tracks, since you can keep a safe distance with a MinecartMinecart with decent speed. Jump mobility is more limited when using Minecarts, but lasers can be avoided by speeding up or slowing down.

Killing the Wall of Flesh will generate a bricked-in treasure box above your bridge. The bricks can serve as kill-markers, but they may interfere with movement if your next fight runs close to that spot.

In Expert Mode, players may want to make holes on the bridge to drain Lava from killing Lava SlimeLava Slimes; alternatively, Obsidian Platforms, Stone Brick Platforms, or Planter Boxes can be used, as they do not break when contacting lava, and the materials to make the former two can be obtained in bulk by demolishing the Ruined Houses, or by collecting stone that you've mined throughout the game. One could also equip Royal GelRoyal Gel(Desktop, Console and Mobile versions) to prevent Lava Slimes from attacking, though this method will still generate lava if the lava slime dies.

The Destroyer

Using a Daedalus Stormbow with Holy Arrows can be extremely effective due to the Destroyer's length making it easy to hit. Making a sky arena is also very effective, making it so that the Destroyer is unable to hit you.

This content is transcluded from Guide:The Destroyer strategies.Like with the Eater of Worlds, a tall, wide arena with multiple rows of Platforms can make dodging its main body easier. Alternatively, standing on a rectangular box around 150 blocks into the air will make the Destroyer unable to reach the player while also protecting them from its lasers, leaving only the Probes as a threat. However, the player should be careful about building the box too high as Harpies and Wyverns may start to spawn. Wiring Boulder Statues below the box to some timers will also deal a fair amount of damage. Additionally, running along a long platform with plenty of campfires and sunflowers is a viable strategy, as all off screen air blocks are treated like solid tiles to the Destroyer. This also allows you to more easily dodge its lasers if they are behind you, and using the mini map can help you see where it may pop up next.

The Twins

This content is transcluded from Guide:The Twins strategies.The Sky above the surface is highly recommended for the Twins arena, as vertical movement is required to dodge most of the attacks.

  • A very long Sky Bridge (if possible made out of Asphalt BlockAsphalt or Frozen Slime BlockFrozen Slime Blocks) is optimal. Continuously running with Spectre BootsSpectre / Lightning BootsLightning / Frostspark BootsFrostspark / Terraspark BootsTerraspark Boots(Desktop, Console and Mobile versions) causes both to miss you with their projectiles very often, and keeps each Twin at a stationary horizontal position most of the time, allowing you to fire continuously at it without switching your aim. Wings will help dodge each of the Twins' second phases. Using Asphalt can negate the need for Boots, while using them can allow you to avoid taking damage completely. However, try not to run too fast if you use Boots and Asphalt, as Retinazer may fall behind and despawn. Spazmatism, however, is fast enough to keep up. Regular stone blocks can be used too if you have obtained the Blessed AppleBlessed Apple(Desktop, Console and Mobile versions).
    • This is only possible if another mechanical boss has been defeated as the steampunker will have to sell the blend-o-matic to make the asphalt blocks.
  • The standard Boss arena of several layers of Platforms with furniture buffs makes maneuvering around easier.
    • Also, a wall on both sides of a small area can block Spazmatism's cursed fire, but be careful not to run out of time from covering behind the wall. It is helpful to have a one block hole one block up to shoot through. This is more useful if you want to try tanking the boss with the above tip of heart statues. If you can tank the hits with the help of heart statues, you can gun down Retinazer while Spazmatism is only able to charge at you.
  • A safety box in the ground isn't bad either, if you acquired the Daedalus StormbowDaedalus Stormbow(Desktop, Console and Mobile versions). That way you could attack Retinazer while its laser can't hurt you in the box. In order to attack Spazmatism make the box one block from the surface and bring Holy ArrowHoly Arrows, the impact from the stars could hurt it. Stay close to the edge so the Cursed flames can't hurt you.

Skeletron Prime

This content is transcluded from Guide:Skeletron Prime strategies.As with all bosses, an arena made out of Wood Platforms or Minecart Tracks greatly increases your mobility, and it will also moot the Prime Cannon. You will want several rows of Platforms, each around 50 or so blocks long. The platforms should be suspended off the ground to prevent the Prime Cannon's grenades from detonating too close to you. A solid ceiling should be avoided since Skeletron Prime will often retreat a fair distance when not using his spinning attack. It is also best to use frozen slime blocks as they keep the mobility of any speed enhancements.

Plantera

This content is transcluded from Guide:Plantera strategies.

Golem

This content is transcluded from Guide:Golem strategies.

  • Create a small wall dividing the entrance and the arena, leaving an opening for your projectiles to get through. This becomes difficult to build if your default layout has the entrance in the ceiling.
  • Create a much larger wall that divides the arena on either side of the altar leaving an opening at the top for you to leap through post-spawn and a spot for your weapons.
  • An assortment of small walls scattered throughout the arena.
  • A small pit that you can leap into while Golem stomps and punches. This will allow you to deal heavy damage, but you have to be cautious about his eye lasers and fireballs. A heart statue in the pit with you can be useful in keeping you alive.
  • TeleporterTeleporters can be used for dodging the attacks and move safely and instantly from side to side when fighting outside the temple.
  • If you decided to fight Golem in the temple, then Lihzahrd BannerLihzahrd and Flying Snake BannerFlying Snake Banners would be useful because they will still keep spawning during the fight. It'll be much easier to get rid of them.
  • (Desktop, Console and Mobile versions) In 1.4 Golem can pass through walls, so dividing the arena vertically is much less useful. Also, it can follow you downwards, even into very small openings. The best way to avoid contact with the body is to place a row of platforms about 25-30 blocks from the ground, as Golem is still unable to jump that high.
  • (Old-gen console and 3DS versions) actuators can be used to make tiles inactive, allowing more room to move around in the arena.

For safety reasons, you should remove all the pressure plates in the temple or on Old-gen console version Old-gen console version and Nintendo 3DSNintendo 3DS version version remove all of wires, as these can be hazardous in the fight.

Duke Fishron

This content is transcluded from Guide:Duke Fishron strategies.

Lunatic Cultist

This content is transcluded from Guide:Lunatic Cultist strategies.A basic arena with some rows of platforms will suffice. If the player made an arena for Skeletron, they can reuse it here.

Moon Lord

This content is transcluded from Guide:Moon Lord strategies.Asphalt can be used as a sky bridge material to outrun the boss and dodge its tongue if you value the ability to use Vampire Knives. When the Moon Lord teleports with his tongue already chasing you, the tip of the tongue will not teleport with him. This allows you to completely outrun the tongue, avoiding Moon Bite and allowing Vampire Knives/Spectre armor to work normally.

Terrain prep can be skipped by using a form of infinite flight, such as the Witch's Broom or UFO Mount or a pair of late-hardmode wings coupled with the Soaring Insignia, although it is still wise to build a nearby house for the Nurse.

Dungeon Guardian

This content is transcluded from Guide:Dungeon Guardian strategies.

  • The first option is simply use the whole map, by using Gravitation Potions to move around. You will fall faster than it and you can move diagonally to go even faster.
  • The second option is a very long Skybridge. You will be equally fast as the Dungeon Guardian when running horizontally and jumping with wings. If you want to outrun it make a diagonal skybridge or build the skybridge out of Asphalt.
  • The third option is to simply use a good pair of Wings or a flying mount such as the Cosmic Car Key, Witch's Broom (Expert Mode only) or Shrimpy Truffle (Also Expert Mode only) with a clear, open space.
  • The fourth option requires a rail system that goes in a circle, using a fast Minecart (Using a boosted Minecart is more useful) or Booster Tracks. This can also be automated with Traps, such as Spike Ball or Spear Traps within the rail circle of with summons and a Star Wrath.
  • The fifth option is to set up a Hoik loop. As the Dungeon Guardian spawns, use a recall potion to get to a spawn point set up near the Hoik loop, and mount it. If timed correctly, you will loop around fast enough to make the Dungeon Guardian constantly change direction, and, as a result, it will simply spin in tight circles in the center of the Hoik loop.

To reliably "summon" the Dungeon Guardian, it is recommended to dig a shaft straight down from outside the dungeon. The Depth Meter or any of its upgrades are recommended for this.

If the player has access to the Mechanic ((Old-gen console and 3DS versions)and Steampunker) it is possible to build a Teleporter arena (example). This can make the fight dramatically easier, especially if the Teleporters are automated with Timers. As the Mechanic is found in the Dungeon, it is required for the player to bring materials from a world where Skeletron has already been defeated.

Invasions

General Invasions

See also:Guide:Defending against invasion events

Invasion events such as the Goblin Army, Pirate Invasion and Martian Madness can only be fought near the Spawn, or somewhere close to an NPC.

Before starting an event, make sure NPCs are protected, otherwise they will be attacked and possibly killed during the fight. Placing a block in front of a Door will prevent enemies from forcing them open and killing the NPCs.

If defended properly, the events can then be easily fought on a player's Base, using the Houses built as cover. Since most enemies from invasions lack the ability to attack through walls, they can be easily killed while standing above them in an enclosed room. However, make sure to have an exit ready for when the enemies that can attack through blocks spawn.

Old One's Army

This content is transcluded from Guide:Old One's Army strategies.

An example of an Old One's Army arena.

Before facing the event, making a completely flat arena works very well. If an enemy's path to the Eternia Crystal is blocked, it will phase through obstacles, so trying to stop their progress with blocks won't be very effective. Building the floor with Asphalt BlockAsphalt Blocks will greatly increase movement speed. Using Potions is always a good idea, while it is also good to place CampfireCampfires, Heart LanternHeart Lanterns, Honey BucketHoney, Heart StatueHeart Statues and Bast StatueBast Statues(Desktop, Console and Mobile versions) (Desktop, Console and Mobile versions) to survive for longer. When fighting Tier 2 and 3, building a ceiling above the Eternia Crystal will protect it from Kobold Gliders, since they explode on contact with blocks.

Build a raised platform 20 blocks off the ground, halfway between the Eternia Crystal and the expected portal location. Placing Flameburst TowerFlameburst Towers(Desktop, Console and Mobile versions) on these platforms will allow them to target flying enemies more easily, which can reduce swarming of the Crystal in later waves.

Placing a vertical wall behind the spawning points of the portals will allow you to effectively cover both sides of the arena with bouncing projectile weapons like the Water Bolt and Pulse Bow. It may also be a good idea to build houses for competent combat NPCs like the Princess or Pirate behind the portals, so they can help kill enemies without any danger to themselves.

Moon Events

Extensive arena for the Moon Events, making heavy use of platforms, Asphalt and passive healing tiles.
Example of an arena, making heavy use of Traps. Note that on higher difficulties, Traps are hardly useful.

The Pumpkin and Frost Moons are much easier to handle with the proper arena.

A flat surface about 168 blocks wide (See NPC spawning) will focus all spawns on the arena. Above it there should be a long platform of the same width, high above the ground in order to keep grounded enemies out of reach.

Since the player will mostly focus on the Bosses on the later waves, Lava pit and Traps may be helpful to take out the weaker enemies more easily. However, on higher difficulties the Traps' low damage is practically useless against the higher-health enemies, making them almost a liability due to the invincibility frames they provide and the risk of being hit by them and taking massive damage in the process.

It's also a good idea to make a room with a BedBed near the Arena, so in case of death you can quickly get back to it.