Mutant Snow Golem

Changes from Mutant Creatures

• Immune to each other's damage
• Only retaliate against hostile mobs
• Take damage every 3 seconds when in a biome with a temperature over 1.2, and create water dripping particles
• Can only spread snow in biomes with a temperature less then 0.95
• Do not drop a Jack O' Lantern when killed, as they can be sheared like a normal Snow Golem to drop it