This brings the boss's overall health up from 3250 health to 5525 health. The Creepers gain a health increase of the same percentage, going from 100 health up to 170 health.This brings its original Classic Mode health of 1250 health up to 2125 health. In Expert mode, the Brain of Cthulhu gains a 70% health increase.In the second phase, the Brain becomes vulnerable to attacks and knockback and it aggressively attempts to ram the player while rapidly teleporting around. Once all Creepers are defeated, the Brain enters its second phase.

The Creepers do not teleport along with the Brain but are instead pulled between the player and the Brain in large, sweeping orbits, forming groups and allowing the player to deal damage to all the Creepers at the same time. It teleports around the player, drawing nearer before teleporting away again in a random direction while its Creeper minions attack the player. The Brain itself is initially invincible. When Otherworldly music is enabled, the track Boss 1 (Otherworldly) (Otherworldly).mp3 will play instead. While the Brain of Cthulhu is alive, the music Boss 3 will play. Unlike its Corruption counterpart, it does not have a mechanical equivalent in Hardmode. The Brain of Cthulhu is the Crimson counterpart to the Eater of Worlds. Defeating the Brain of Cthulhu for the first time allows the Tavernkeep NPC to spawn. All Creepers must be destroyed first before the Brain of Cthulhu enters its second phase, where it becomes vulnerable to attack and can be killed.ĭefeating the Brain of Cthulhu and its attendant Creepers is the only way to obtain Tissue Samples, and is one of the ways to obtain usable quantities of Crimtane Ore. Creepers do not respawn once they are killed. 20 Creepers spawn along with the Brain and orbit the boss at high speed. In the first, the Brain is invulnerable and teleports randomly around the player. It can be summoned when 3 Crimson Hearts are destroyed in a Crimson world, or when a player uses a Bloody Spine anywhere in The Crimson or Underground Crimson biome. The Brain of Cthulhu is a pre-Hardmode, Crimson-themed boss resembling a large, flying brain. For the Old-gen console, Windows Phone, and 3DS pet summon, see Brain.

Icon for brain