PvP Epic Open Server Gamemode - Players vs. Mobs!

How about a brand new PVP style game mode where players can play as mobs or people in an open server world?!

For example, you could play as a Witch and be able to use items that the Witch can use in regular survival mode, like potions and splash potions. You could then go to battle against a normal human player and loot him or her if you win!

Since this would require item usage, playable mobs would only include humanoid type mobs.

Just imagine a battle between an Iron Golem and a Skeleton - who would win?!