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 Set Code: STX-C Legality: Legal in timeless, Legal in paupercommander, Legal in brawl, Legal in pauper, Legal in historic, Legal in gladiator, Legal in oathbreaker, Legal in commander, Legal in legacy, Legal in pioneer, Legal in penny, Legal in duel, Legal in modern, Legal in vintage Price: $0.21 Foil price: $0.31