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 timeless, Legal in paupercommander, Legal in brawl, Legal in commander, Legal in oathbreaker, Legal in vintage, Legal in duel, Legal in pauper, Legal in legacy, Legal in pioneer, Legal in gladiator, Legal in modern, Legal in historic Price: $0.15 Foil price: $0.28