You were exploring the Crimson's chasms and looting the vicious place, the screams that echo around the bloody environment makes a horrible chill goes down your spine, you break three of the crimson hearts, which was noticed by the abhorrent evil that lurks in the vile red mire, the Brain of Cthulhu comes out of the shadows, floating slow above the crimstones with ill intentions, the otherworldly brain hover low in your front, its eye-like yellow creepers orbiting it and looking at you