Professor's Warning
Strixhaven: School of Mages (STX) #84 · Common · Instant
Mana cost: {B}
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.)
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familiar with the rise of tyrants.
Illustrated by Kieran Yanner · Released April 23, 2021
Prices
- Nonfoil: $0.29 USD · €0.22 EUR
- Foil: $0.27 USD · €0.18 EUR
Nonfoil price since August 17, 2026: up $0.05 USD (20.8%) to $0.29 USD; low $0.24 USD, high $0.36 USD.
Printings
- Strixhaven: School of Mages #84 (this printing) · Common · 2021 · $0.29 USD
Legality
- Standard: Not legal
- Alchemy: Not legal
- Pioneer: Legal
- Historic: Legal
- Modern: Legal
- Brawl: Legal
- Legacy: Legal
- Timeless: Legal
- Vintage: Legal
- Pauper: Legal
- Commander: Legal
- Penny: Not legal
- Oathbreaker: Legal
- Duel: Legal