Name: Corrosive Mentor Cost: 2B CMC: 3 Color: B CID: B Type: Creature -- Elemental Rogue Pow/Tgh: 1/3 Rules Text: Black creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.) Set/Rarity: Shadowmoor uncommon Legality: Legal in commander, Legal in legacy, Legal in vintage, Legal in predh, Legal in duel, Legal in oathbreaker, Legal in modern Price: $3.68 Foil price: $16.47