Woodlurker Mimic

Creature — Shapeshifter — {1}{B/G}

Whenever you cast a spell that's both black and green, this creature has base power and toughness 4/5 until end of turn and gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)

Rarity: common

EDHREC rank: 29559