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This guide explains how to summon the Brain of Cthulhu in Terraria, covering the steps for breaking Crimson Hearts and crafting Bloody Spines. Each method includes the necessary materials, conditions, and instructions to initiate the boss fight within the Crimson biome.
The Brain of Cthulhu is a pre-Hardmode boss exclusive to worlds with the Crimson biome. Known for its unique teleporting and minion mechanics, the Brain of Cthulhu is a key challenge for progression in Terraria. Summoning this boss can be achieved through two primary methods, each involving specific items or conditions.
Notable Drops
Crimson Hearts are glowing orbs located in the Crimson Chasms, surrounded by Crimstone.
Steps to Summon:
Note: Hearts are usually encased in Crimstone, which can only be mined with a Deathbringer Pickaxe or higher, or destroyed using explosives.
Bloody Spine is a crafted summoning item specifically used to summon the Brain of Cthulhu.
To summon the Brain of Cthulhu using a Bloody Spine, craft the item at a Crimson Altar located in the Crimson by combining 15 Vertebrae and 30 Vicious Powder. Once crafted, use the Bloody Spine in the Crimson biome to summon the boss.
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