Magic: The Gathering · Strixhaven: School of Mages
Professor's Warning
French name: Avertissement du professeur
Professor's Warning (Strixhaven: School of Mages 84) has a market price of US$0.28 to US$0.35 as of Nov 9, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 9, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Instant
- Mana cost
- {B}
- Artist
- Kieran Yanner
Card 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.)
Flavour text
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familar with the rise of tyrants.
About this card
Professor's Warning is card 84 in Strixhaven: School of Mages, a Magic: The Gathering set released Apr 23, 2021. Rarity: Common. Finishes: Normal, Foil. Illustrated by Kieran Yanner. Reference market price on Nov 9, 2026: US$0.35 (Normal), US$0.28 (Foil). Over the last 30 days, the Normal price went up 20.7%. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
