Witherscale Wurm
From Shadowmoor set
Witherscale Wurm
Creature — Wurm
9/9
Whenever this creature blocks or becomes blocked by a creature, that creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)
Whenever this creature deals damage to an opponent, remove all -1/-1 counters from it.
