boss
Brain of Cthulhu
The Crimson's pre-Hardmode boss. Summoned by breaking 3 Crimson Hearts or a Bloody Spine.
In a 
Crimson world the Brain replaces the Eater of Worlds. Break 3 
Crimson Hearts or use a 
Bloody Spine (15 
Vertebrae + 15 
Deathweed). Drops Crimtane Ore and 
Tissue Samples for Crimson gear. Use piercing weapons and platforms to dodge the Creeper swarm.
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