Hakai of the Homunculi

+2: Until end of turn, whenever you cast a spell, Hakai of the Homunculi deals 1 damage to target creature, planeswalker or player.
-2: Until end of turn, whenever you cast a spell, put a +1/+1 counter on each creature you control.
-12: You get an emblem with "Your opponents can't cast more than one spell per turn."