Evil Scientist

A guy wearing weird sunglasses, who wanders the world laughing. He's neutral, but at some point a really big cobblestone tower will spawn, he'll climb it via a ladder, and then water will pour down it. At this point, all hell will break loose. Weirdly - shaped energy bolts will fly around hurting mobs (and especially you), and then the mutated mobs start spawning. Giant Chicken and Evil Pig appear, as well as giant guys and Evil Snowmen. If you kill the Scientist while this is happening, the tower will dissapear but the mobs will not. The Scientist's skin changes when the mobs start spawning, into a really weird, red-eyed, soot-blackened madman. After a few minutes if this, the tower will vanish and the scientist will hunt you down and kill you with the mobs that spawned.