Boltzmann Brain

The Boltzmann Brain as an enemy / disaster is a bastardization of the type of entity described by the real thought experiment of the same name.

Appearance
The Boltzmann Brain takes the appearance of a human brain, though it is much larger. It emits a blue glow. When it is killed, the glow will go away and the brain's true color is shown; red and pink.

Ai
The brain will find a random player. It will teleport within 20 studs of them and play a "pop" sound. For the next 5 seconds, it will rush towards them in an attempt to touch them. After it rushes towards them, it stops moving itself. It can be pushed around at this point. It will wait 5 more seconds before finding another player.

Sounds

 * A popping sound will play whenever it teleports.
 * A "scary" sound will play if a player touches it during its attack phase.
 * A screaming sound will play when it kills a player or if it dies. This is supposed to represent the player screaming from getting scared to death by it.