Corrupted Sylvan

Deathtouch
{b/g}, Sacrifice another Elf: Put a +1/+1 counter on Corrupted Sylvan and you gain 2 life.
{b/g}{b/g}{b/g}, Remove three +1/+1 counters from Corrupted Sylvan: Destroy all other creatures.
Life is no treasure to be cherished, but suffering to be survived.