THE BRAIN OF CTHULHU

The brain of cthulhu I think was one of the strongest bosses I ever faced or I was just really weak. It is really hard to spawn it took me like a week. Okay to spawn it you need 15 vertebrae. which drops from face monsters, blood crawlers and cimeres.Once you get 15 go to a demon altar and craft a thing called a bloody spine.And you have to spawn it in the crimson and if you leave the crimson it will despawn. That is the brain of cthulhu