Name: Collective Nightmare Cost: 2B CMC: 3 Color: B CID: B Type: Instant Rules Text: Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Target creature gets -3/-3 until end of turn. Set/Rarity: March of the Machine uncommon Legality: Legal in duel, Legal in legacy, Legal in brawl, Legal in oathbreaker, Legal in modern, Legal in commander, Legal in historic, Legal in timeless, Legal in pioneer, Legal in gladiator, Legal in vintage Price: $0.05 Foil price: $0.19