Name: Professor's Warning Cost: B CMC: 1 Color: B CID: B Type: Instant Rules Text: Choose one -- - Put a +1/+1 counter on target creature. - Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.) Set/Rarity: Strixhaven: School of Mages common Legality: Legal in oathbreaker, Legal in pioneer, Legal in vintage, Legal in commander, Legal in timeless, Legal in gladiator, Legal in brawl, Legal in modern, Legal in duel, Legal in historic, Legal in paupercommander, Legal in pauper, Legal in legacy Price: $0.29 Foil price: $0.25