Virelsa, Grove-Twister

Deathtouch

Whenever a creature dies, you may put a +1/+1 counter on Virelsa, Grove-Twister.

{1}, Sacrifice a Forest or Swamp: Target creature gets
-X/-X until end of turn, where X is the number of +1/+1 counters on Virelsa.

She was once the heart of the forest. Now she feeds on its rot.