Balvarak, Ancient Defiler

Flying, lifelink, deathtouch, haste
Whenever Balvarak attacks exile two cards from
the top of an opponent's libraty for each +1/+1 counter on it.
Sacrifice a creature: Put a +1/+1 counter on
Balvarak. Lose life equal to the number of +1/+1 counters on it. It becomes indestructible until
end of turn.