Zarod, The War Maker

Menace, Trample

Whenever a creature you control deals combat damage to a player, put a Blood counter on Zarod, God of War.
At the beginning of your end step, if Zarod has three or more Blood counters, you may remove them. If you do, creatures you control get +2/+0 and gain haste until end of turn.

Blood Frenzy - Whenever a creature you control dies, you may pay {1}{r}. If you do, Zarod gets a +1/+1 counter.