Overmind

The Overmind is the main antagonist of StarCraft: Fan Edition. It is the leader of the Zerg Swarm and it was created by the original Overmind merging with the Second Overmind. It began as a couple of cerebrates bringing the second overmind's corpse to the original overmind. The rest of the Zerg Swarm realized it's critical mass was too low for it to regenerate. So a couple of cerebrates merged with the corpse, and the Strongest Cerebrate became it's brain. SInce then, it has been expanding the Zerg Swarm, adding more and more bodies to itself. It caused a lot of mayhem.