Beastly Curse

Enchant Human creature you control
Enchanted creature gets +2/+2, has trample, is a
green Beast and can only attack or block alone.
Whenever enchanted creature deals combat
damage to a player, you may tap an untapped
Human you control. If you do, exile that creature
and the enchanted creature, then return Beastly
Curse to the battlefield transformed under your control.