Talk:Brain of Cthulhu/@comment-24022850-20131008105519

It seems random how many hearts you can open before the brain spawns. He spawned on the 3rd heart the first two times I spawned him, but then again after just 1 heart, and then again after 2 more hearts.

Yeah, just make sure you have a platform and space to move around, don't get trapped down one of the small areas near the hearts - he spawns very quickly after a heart is opened.