Gravehelm, The Looming

Flying, deathtouch, haste
Whenever Gravehelm, The Looming attacks,
destroy all creatures with less power than it.
{b}{b}{b}: Exile two target creatures from a
graveyard. Gravehelm, The Looming gains
+1/+1 for each creature in a graveyard until
end of turn. Activate this ability only once
per turn.