Woodlurker Mimic
d86dd5a9-4793-4ca2-b94d-4333781b1468
$0.25 CND
Whenever you cast a spell that's both black and green, Woodlurker Mimic 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.)