Deerclops

This boss is from the Don't Starve Together collaboration that Terraria has done.

The Deerclops is a difficult pre-Hardmode boss. It is one of the final bosses a player may encounter during pre-Hardmode.

Summoning
The Deerclops can be summoned using a Deer Thing at any time of day as long as the player is in the Snow biome. It also spawns naturally at midnight during a Blizzard.

There are no prerequisite bosses that are required to be defeated in order to summon this boss, however, the Deerclops' strength may warrant waiting until after defeating the Eater of Worlds or Brain of Cthulhu to fight it.

Behavior
The Deerclops has three attacks:
 * Summoning a wave of ice spikes from the ground.
 * Throwing chunks of ice into the air.
 * Summoning damaging nightmare hands that chase the player.

Getting too far away from The Deerclops makes it invincible, and it will stay that way until the player returns to its range.

When far from the player, the Deerclops can pass through blocks, but otherwise remains on level ground.

Tips
For more elaborate strategies on defeating Deerclops, including weapon and arena recommendations, see Guide:Deerclops strategies.

Trivia

 * The Deerclops is the main source of Don't Starve crossover content.
 * The Deerclops is the only boss in Terraria to not despawn after killing the player.
 * The Deerclops is one of 2 boss fights that consists of a single destructible entity, the other being the Empress of Light.
 * All other boss fights have either multiple bosses, multiple segments or boss minions that play a part in their boss fights.
 * The Deerclops is the first non-event crossover boss, as well as the first non-event pre-Hardmode crossover boss.
 * Deerclops is one of 5 Bosses with exclusive boss music. The others include Queen Slime, Plantera, Empress of Light, & Queen Bee.
 * The Deerclops is the first boss to be themed around the Snow biome, leaving the Desert as the only major biome with no boss representing it.