Damage Multipliers

This mod adds one thing and one thing only: A new game rule: 

multiplicativeDamageIncrease

 This game rule, when set, will multiply base damage taken by the value specified.

If set to 2, a zombie will deal 6 damage instead of 3, and if set to 0, a zombie will do 0 damage instead of 3.

By default, the game rule is set to 1 (normal base damage), but can be configured before world creation or with cheats.