The Frost Legion is a Hardmode event during which unique Snowman enemies spawn and swarm a player's spawn point, similar to the Goblin Army. It is summoned using the Snow Globe, and defeating it unlocks the Santa Claus NPC.
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The Frost Legion must be summoned using the Snow Globe, which is acquired from Presents obtained during the Christmas seasonal event ( December 15–31 / December 1–January 15 / one in-game day after defeating Frost Moon). Unlike the Goblin Army, the Frost Legion can only be summoned by the player, using the Snow Globe. The Legion will never invade on its own. Similarly, while Presents only drop during the Christmas event, they can be opened anytime. To obtain a Snow Globe, the present must be opened in Hardmode, but not necessarily during Christmas. Even though the Snow Globe can only be obtained in Hardmode, the Frost Legion can be summoned in a pre-Hardmode world, and it does not need to be during Christmas.
When summoned, a status message will appear: "The Frost Legion is approaching from the [east/west]!"
The direction specified in this message only pertains to the initial wave of Snowmen, which spawns at the world's edge and travels to the player's original spawn point. Additional waves spawn immediately within the player's original spawn area. If the message says "west", the Snowmen will come from the left. If the message says "east", they will arrive from the right. Note that these directions are not related to the apparent motion of the sun and the moon, which, in Terraria, appear to move from left ("west") to right ("east").
When the Frost Legion is about to begin spawning around the player's spawn point, the following status message appears: "The Frost Legion has arrived!" The theme music will switch to the Boss 3 theme.
Completing the event
- The event is completed when a certain threshold of enemies defeated is reached: A base number of 80 Snowmen always spawns. For each player with at least 200 maximum health, an additional 40 Snowmen spawn. Thus a single player needs to defeat 120 Snowmen, but if eight qualifying players are present, they will have to defeat 400 Snowmen. The largest possible Frost Legion is 10,280 Snowmen, for a game with 255 qualifying players.
- When the final wave of Snowmen is on the screen, a status message will appear saying, "The Frost Legion has been defeated!", and the music will return to normal once all of the Snowmen are cleared from the screen.
- Once the Frost Legion is defeated, the Santa Claus NPC will be available and will move into an empty house, but will only be present from December 15–31. However, it is possible to get him as early as December 1 on the Nintendo version.
- Furthermore, the Clothier starts selling the Balla Hat and the Gangsta Hat.
- Snowmen override the current biome's enemies in the same way as Meteor Heads and the Goblin Army do.
- The invasion will not prevent most other events or boss fights.
- A Blood Moon may occur during a Frost Legion event, but will only cause other enemies to spawn after the Frost Legion has been defeated.
- If the player happens to be on the Ocean floor when a Frost Legion is approaching, the initial wave of Snowmen will spawn underwater. Additional waves will only spawn when the player returns to the world spawn point.
- Snowmen will not break down doors, unlike the Goblins from the Goblin Army.
- The Frost Legion does not leave if the player exits the world and comes back; they will stay until defeated.
- The Frost Legion can be summoned in Pre-Hardmode, but the Snow Globe is only obtainable in Hardmode.
- As in other invasions, if the player is far enough underground, the Snowmen will not spawn, even after getting the message that they have arrived. This means it is not necessary to head back to the spawn immediately upon receiving a message of an imminent attack. However, the invasion will remain and the Snowmen will appear as soon as the player arrives at the surface.
- The Snowmen are incapable of jumping down through simple platforms.
- While the snowmen are individually much tougher than goblins, they have no casters or even flyers. With suitable equipment and/or a secure base, defeating them is trivial. On the flip side, this is not a lucrative event; its big draw is Santa Claus. That said, they make an excellent target for money farming with a Coin Ring and Slime Staff.
- The Frost Legion tends to leave placed Snow Blocks everywhere. It may be preferable to fight them some distance from the player's base, to avoid having to "clean up" afterward.
- The Snowmen are considered as cold-themed enemies, so a Warmth Potion would be very helpful.
- The natural deposits of Snow Blocks are limited in a world. However, the Snowmen dropping them makes them a renewable resource. A single-player Legion will drop an average of 900 blocks (another 450 for each additional player) plus whatever they threw during the fight.
- If fighting them during Christmas, there is a better than even chance for a (single) player to get a replacement Snow Globe from the Presents the snowmen drop.
- It is possible to obtain Presents (and thereby a Snow Globe) outside of the usual time limits of the Christmas event by altering the date and time settings of the player's device.
- Reaching wave 15 of the Frost Moon will unlock one in-game day of Christmas, regardless of date, which in turn allows the player to farm Presents for Snow Globe drops.
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- The Frost Legion has the least amount of item drops in the game, only dropping snow blocks.
- A fourth Snowman sprite is seen within the game resources with dynamite lodged in its head, but it is not used in the game.
- The achievement "Do You Want to Slay a Snowman?" is a joke on the famous song Do You Want to Build a Snowman? from the 2013 Disney animated feature movie Frozen.
- Although it says this event will swarm the world spawn, in reality, it swarms the area nearest to the player as long as NPCs are nearby. For example, if a player is in the Ocean while an invasion event is happening, the invasion will swarm spawn, whereas if the player has an NPC with a beach-side house at the Ocean, the invasion will swarm that area instead.
- “Snowman” is slang for a gangster, hence the theme of the Legion’s enemies.
- Desktop 1.3.5: All enemy sprites updated.
- Desktop 188.8.131.52: Mister Stabby, Snow Balla, and Snowman Gangsta now all drop their own respective banners.
- Desktop 1.1.1: Introduced.
- Console 1.0.933.1: Mister Stabby, Snow Balla, and Snowman Gangsta now all drop their own respective banners. ()
- Console 1.0.750.0: Mister Stabby, Snow Balla, and Snowman Gangsta now all drop their own respective banners. ()
- Console-Release: Introduced.
- Switch 1.0.1096.2: Enemy sprites updated to match Desktop 1.3.5.
- Switch 1.0.711.6: Introduced with changes up to Desktop 184.108.40.206.
- Mobile 220.127.116.11: Mister Stabby, Snow Balla, and Snowman Gangsta now all drop their own respective banners.
- Mobile 1.1.5536: Introduced.