Nergigante, the Elder-Eater

Flying, Trample, Haste, Devour 5
Sacrifice a creature: Put a +1/+1 counter
on Nergigante, the Elder-Eater. If a
legendary or dragon creature was
sacrificed this way, put five +1/+1 counters
on Nergigante instead.
"Its penchant for destruction is
well documented" - Research notes.