Skeletron

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Desktop version Console version Mobile version
This is the main page whose information applies to the Desktop, Console, and Mobile versions of Terraria.
For the differences of this information on Old-gen console and 3DS, see Legacy:Skeletron.
SkeletronSkeletron Head
Skeletron Head.png
Map Icon Skeletron.png
Map icon
Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
Statistics
Type
Boss
Environment
Dungeon entrance + Night
AI TypeHead AI
Damage32/70/106(contact)
68 (Skull)[1]
91 (while spinning)[1]
102 (Skull)[1]
137 (while spinning)[1]
9999 (during day)
Max Life4400/8800/11220
Defense1010+25 per hand alive
00+25 per hand alive (while spinning)
9999 (during day)
KB Resist100%
Immune toPoisonedConfusedPenetratedBlood ButcheredTentacle SpikeBleedingHemorrhage
Inflicts debuff
Inflicts debuff
DebuffBleedingBleeding
Debuff tooltipCannot regenerate life
Chance100%
Duration6–10 seconds7.5–12.5 seconds
Drops
Coins5 GC12 GC50 SC
Projectile created
Projectile created
  • Skull
    Skull
Sounds
Hurt
Killed
Spawn
or
Entering spinning phase
SkeletronSkeletron Hand
Skeletron Hand (NPC).png
Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
Statistics
Type
Boss Part
Environment
Dungeon entrance + Night
AI TypeSkeletron Hand AI
Damage20/44/66
Max Life600/1560/1989
Defense14
KB Resist100%
Immune toBleedingConfusedPoisonedHemorrhage
Inflicts debuff
Inflicts debuff
DebuffSlowSlow
Debuff tooltipMovement speed is reduced
Chance50%
Duration1−2 seconds1.5–2.5 seconds
Sounds
Hurt
Killed
Map Icon Skeletron.png “The cursed guardian of the dungeon.” Map Icon Skeletron.png
Not to be confused with the Skeleton, an enemy found underground, or Skeletron Prime, the Hardmode version of Skeletron.

Skeletron is a pre-Hardmode boss. Defeating Skeletron for the first time grants unlimited access to all Dungeon areas for players within the current world and allows the Clothier NPC to move into an available vacant house.

If attempting to enter the Dungeon before killing Skeletron, Dungeon Guardians spawn once a player reaches 0 depth.[2] These enemies deal 9,999 damage and generally kill any player in a single hit. Managing to defeat a Dungeon Guardian does not grant access to the Dungeon, thus defeating Skeletron is mandatory for accessing the Dungeon safely.

While Skeletron is alive, its exclusive music Skeletron will play. When Otherworldly music (Desktop, Console and Mobile versions) is enabled, the track Boss 1 (Otherworldly) will play instead.

Summoning

Summoning Skeletron requires the player to speak to the Old Man at the Dungeon's entrance at night. Upon selecting the "Curse" option, he will turn into Skeletron. Skeletron can only be summoned once per night, as the Old Man will not respawn until dawn.

Once Skeletron is defeated, the Old Man's curse will be lifted and he will no longer appear. Skeletron will thereafter only be summonable with the Clothier Voodoo Doll. Killing the Clothier at night with this accessory equipped will summon Skeletron.

A special variant of Skeletron can be summoned via Chippy's Couch. See Red Hat variant below.

Behavior

Skeletron is a large floating skull with two independent floating hands. All parts can travel through blocks, and will attempt to make contact with the player to inflict damage. Each part can be killed independently, but killing the head is all that is required to defeat Skeletron.

Skeletron alternates between two attack phases:

  1. The head remains above while the hands slash at the player.
  2. The head spins and begins chasing the player, dealing significant damage if touched, but dropping its defense by 10 (to 0 in Classic Mode) for the duration of the attack.

Skeletron switches between these two phases in a regular cycle during the entire fight, with the first phase lasting for roughly 13.33 seconds and the second phase lasting for roughly 6.67 seconds. It lets out a roar every time it enters the second phase.

If the player takes too long to kill Skeletron and dawn (4:30 AM) arrives, it will enrage and begin acting exactly as a faster Dungeon Guardian, permanently performing its spinning attack as well increasing its damage and defense to 9,999, usually killing any players remaining in the vicinity quickly upon contact. Skeletron remains in this form until it dies or despawns, even if players manage to avoid dying until the following dusk. Killing Skeletron in this form still counts as defeating it and it will drop its items normally.

Expert Mode

Skeletron has additional properties in Expert Mode(Desktop, Console and Mobile versions):

  • The defense of its head is increased by 25 for each of its hands, resulting in a total defense of 60, initially. Once one hand is defeated, it drops to 35 and finally to 10 when both hands are defeated.
    • During the spinning attack, Skeletron's defense is therefore also only reduced to 50 / 25. Only with both hands defeated, it is reduced to 0 like in Classic Mode.
  • While spinning, the head gets a 30% damage boost, making it deal 91 / 137 damage.
  • Skeletron will inflict debuffs upon contact with the player: its hands are able to inflict Slow for 1–2 / 1.5–2.5 seconds, and the head is able to inflict Bleeding for 6–10 / 7.5–12.5 seconds.
  • Hand slashes are 50% more frequent and receive a 16% speed increase.
    • Additionally, the hands return to the head faster after their attack.
  • The head accelerates and moves faster when not spinning.
  • The spin attack has its speed increased by 233%. Additionally, it gets further increases under certain circumstances:
    • 5% increased when one hand is defeated, and 10% when both are defeated.
    • If the player is 9.375 tiles away or more, its speed gets multiplied by 1.1 for every 3.125 tiles above this threshold, up to 2.6× speed when at 37.5 tiles away.
  • Once either of the hands are destroyed or the head's health is reduced to below 75% (6,600 / 8,415), the head begins to shoot homing skullshoming skulls at the player that despawn on contact with a solid block. It shoots one skull roughly every 1.33 seconds, and doubles the frequency to one skull roughly every 0.67 seconds once both hands are defeated. It pauses firing during its spin attack.
  • Skeletron moves faster and has better AI when targeting multiple players. With this, it is able to "stun-lock" the player while spinning, able to almost instantly kill them if they are not able to escape (e.g. by using a hook).

Red Hat variant

SkeletronRed Hat Skeletron
Red Hat Skeletron.png
Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
Statistics
Damage4191137 (contact)[1]
118 (while spinning)[1]
179 (while spinning)[1]
Drops
Skeletron HandRed Hat Skeletron
Red Hat Skeletron Hand.png
Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
Statistics
Damage265785[3]
Dark CasterRed Hat Dark Caster
Red Hat Dark Caster.png

Skeletron has a variant called the Red Hat Skeletron dedicated to Terraria YouTuber and streamer James/ChippyGaming.[a] It can be summoned during night by having the Clothier Voodoo Doll equipped and sitting in Chippy's Couch while the Clothier is nearby. It always drops Chippy's set upon death, in addition to its regular loot.

The Red Hat Skeletron has the following additional abilities:

  • Contact damage is increased by 30%.
  • Time between spinning phase decreased by 1/3 (33.33%).
  • Acceleration increased by 35% when not spinning.
  • Speed increased by 40% when spinning.
  • Can reflect player's projectiles when spinning if any Skeletron Hand is alive.
  • When spinning, it occasionally spawns 1–2 Red Hat variant of Dark Casters.
    • These Dark Casters teleport and fire Water Spheres faster.
    • Up to 4 Dark Casters can exist at the same time.
    • These Dark Casters do not drop any loot; killing them do not increase their kill count either.[4]

One of the following status messages will be displayed when the Red Hat Skeletron begins spinning:

  • "<Skeletron> Please do consider clicking that subscribe button"
  • "<Skeletron> You can save 15% using code: CHIPPY"
  • "<Skeletron> Heeellllllo Terraria enthusiasts!"
  • "<Skeletron> 66.2% of people that watch these videos are not actually subscribed"

Another status message will be displayed when it is defeated: "<Skeletron> That's it for today. I'll see you in the next one. Peace"[5]

Aftermath

Notes

The Old Man at the Dungeon.
  • Defeating Skeletron will also fully unlock the Bestiary entry for the Dungeon Guardian.
  • The Old Man can be killed. However, this does not count as defeating Skeletron, and he will respawn.
  • The Old Man will respawn at the following dawn if the player fails to defeat Skeletron.
  • Killing Skeletron after the night ends will still count as defeating it, and will allow entering the Dungeon safely.
  • Skeletron's defense and damage will revert to their normal figures if the player dies during the day.

Achievements

Achievement Boned.png
Boned • “Defeat Skeletron, the cursed guardian of the dungeon.”
Defeat Skeletron for the first time. (Desktop, Console and Mobile versions)
Category: Slayer Slayer
Achievement Slayer of Worlds.png
Slayer of Worlds • “Defeat every boss in Terraria.”
Defeat every boss in the game. (Desktop, Console and Mobile versions)
Category: Challenger Challenger

Tips

For more elaborate strategies on defeating Skeletron, including weapon and arena recommendations, see Guide:Skeletron strategies.
  • Defeating Skeletron is not necessary for game progression until Golem has been defeated. The Cultists, required for initiating the Lunar Events, will only spawn once both Golem and Skeletron have been defeated. However, skipping Skeletron in pre-Hardmode results in a lack of valuable Dungeon loot, keeps Shadow Chests from being opened (due to the inaccessible Shadow Key), blocks access to the Mechanic, as well as renders the Safe and Void Vault unobtainable.
  • Try to avoid staying above or far to one side of Skeletron for a long time. It will accelerate to move back above the player during this time, and it can be hard to avoid both the head and hands as they rebound into position.
  • The Slime Mount can help the player escape Skeletron's head-spin attack.
  • Using a grappling hook can also help evade Skeletron's attacks and is an especially useful tool to escape its head-spin attack.
  • With multiple players, it is a good idea to set the spawn point near the Dungeon, so that players can simply rejoin the fight if they die.
  • Attacking the hands first is advised, as destroying them both will make it very easy to dodge Skeletron for the rest of the battle.
    • This is pretty much mandatory in Expert Mode, as Skeletron gains 25 defense for each hand it has alive.
    • Moving quickly enough on a minecart can cause the hands to despawn.
  • In Expert Mode, if the player keeps moving in different directions, most of the homing skulls will miss.
    • The player can also jump in a circle around Skeletron's head, aided by a Shield of Cthulhu or Featherfall Potion.
    • Skulls are blocked by solid blocks, so a barrier between the player and Skeletron can let the player attack Skeletron using a yoyo with impunity.
  • Shimmering a Bezoar lets the player use a Adhesive Bandage for the fight, blocking the Bleeding debuff for more value out of health regeneration buffs.

Trivia

Skeletron's head and arms.
The Skeletron-shaped cloud.
Chippy's Skeletron's Hair.
  • Assuming that the player is at 5′ 9″ (1.75 m) in terms of height, Skeletron's head would be about 12′ 2½″ (3.72 m) tall and 9′ 7″ (2.92 m) wide. The hands would be 6′ 2½″ (1.9 m) tall and 6′ 2½″ (1.9 m) across.
  • Prior to 1.0.5, Skeletron Heads protected the Dungeon, but when one was killed, it would count as killing Skeletron, so the Dungeon Guardians were introduced to protect the Dungeon instead.
  • Skeletron's pre-1.3.5 head appears identical to the Dungeon Guardian.
  • Skeletron is the only boss not to have any guaranteed drops (with the exception of healing potions, a Treasure Bag if in Expert Mode and a relic if in Master Mode).
  • In the Terraria and Edge of Space crossover teaser, Skeletron turns into a boss called Omegatron.
  • A cloud in the shape of Skeletron can occasionally be seen in the background.
  • On the initial release of Terraria, Skeletron was the final boss of the game.
  • It is one of the two bosses that needs a town NPC to be alive in order to be summoned. The other is the Wall of Flesh.
  • The sprite file for Skeletron's arms is named Arm_Bone. Similarly, the sprite file for Skeletron Prime's arms is named Arm_Bone_2.
  • In older versions of the game, all parts of Skeletron took increased damage from ranged weapons.Verify
  • The Red Hat variant loses its hat on death, revealing a skull with curly hair. This is in reference to ChippyGaming's signature hair style.
  • Blood emits from the joints between Skeletron's arms and head, possibly implying that they are severed. This aligns with the lore pages.
    • If the Blood and Gore setting in the menu is turned off, the blood emitted from Skeletron's joints is replaced by puffs of smoke.
  • Terraria lore pages – According to the Terraria lore pages, the Dryads ripped out part of Cthulhu's skeleton, and a curse caused all the inhabitants of the Dungeon to become undead.
  • The BestiaryBestiary entry for Skeletron: "The disembodied bones of a former tyrant pulsed with a hatred so strong, it left behind a mighty curse which guards the Dungeon."
  • The "former tyrant" refers to Cthulhu.

History

  • Desktop 1.4.5.0:
    • Added a Red Hat variant that can drop Chippy's set.
    • Daytime damage increased from 1000 to 9999.
    • Can no longer be dodged via accessories when enraged during daytime.
    • Adjusted hand movement when slamming, fixing an issue where it could fly off-screen.
    • The Paladin's Shield can no longer deflect any instant-kill damage from Skeletron.
    • Changed boss track to Skeletron. Previously played Boss 1.
  • Desktop 1.2.1.2: Skeletron now spawns on the Clothier when using a Clothier Voodoo Doll.
  • Desktop 1.0.6:
    • Head health decreased from 5000 to 4400, but damage increased from 30 to 32.
    • Hands health decreased from 800 to 600, defense decreased from 18 to 14, and damage decreased from 25 to 20.
  • Desktop 1.0.5:
    • Head health decreased from 6000 to 5000, defense decreased from 12 to 10, and damage decreased from 35 to 30.
    • Hands health decreased from 1200 to 800, and damage decreased from 30 to 25.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Information taken from the Desktop version Desktop 1.4.5.5 source code, method AI() in Terraria.NPC.cs. The relevant part is the aiStyle == 11 block.
  2. ↑ Note that the player's center needs to be below 0 depth. The player's center is determined by the center of their hitbox, which is 42 pixels high and 20 pixels wide. If we consider the player takes up a 2-tile-wide×3-tile-high area, the player's center will be located at the middle tile in the left column of the 2×3 area when the player is standing exactly at the center of 2 tiles. Since the Depth Meter measures depth at the level of the player's feet, Dungeon Guardians will only start spawning once the Depth Meter displays "3' Underground" or more.
  3. ↑ Information taken from the Desktop version Desktop 1.4.5.5 source code, method AI() in Terraria.NPC.cs. The relevant part is the aiStyle == 12 block.
  4. ↑ Information taken from the Desktop version Desktop 1.4.5.5 source code, method NPCLoot() in Terraria.NPC.cs.
  5. ↑ Information taken from the Desktop version Desktop 1.4.5.5 source code, method checkDead() in Terraria.NPC.cs.
  1. ↑ https://www.youtube.com/@ChippyGaming
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