Crazed Mutations

During the beginning of each players upkeep that player chooses a creature type, creatures he or she controls are the chosen type in addition to their other types until end of turn.
Whenever a creature of the chosen type would die this turn, put a +1/+1 creature on a creature you control equal to that creatures power.
"They say I'm crazy. Let's see them laugh when I unleash my perfect pets."