Professor's Warning
~$0.27 low · ~$0.29 high
Black. Instant
Strixhaven: School of Mages #84 · Illustrated by Kieran Yanner
Strixhaven: School of Mages #84 · Illustrated by Kieran YannerWhat is Professor's Warning worth?
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TCGplayer market prices in USD, updated October 14, 2026. Each price is for one printing and one finish.
Oracle 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.)
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familiar with the rise of tyrants.
Format legality
The only printing of Professor's Warning
| Printing | Rarity | Non-foil | Foil | Cardmarket (EUR) | My collection |
|---|---|---|---|---|---|
 Strixhaven: School of Mages stx #84· 2021common· Cardmarket €0.22 · €0.17 foil | common | $0.29 | $0.27 | €0.22€0.17 foil |
Prices are TCGplayer market prices in USD for each printing and finish, via Scryfall. They are a guide, not an appraisal.
Where to buy Professor's Warning
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Card details
- First printed
- 2021
- Printings
- 1
- Mana value
- 1
- EDHREC rank
- #8,841 on EDHREC (Commander popularity)
- Artist
- Kieran Yanner
What the codes mean
The small print at the bottom of the Strixhaven: School of Mages card (#84).
084 · STX · C · EN
- 084Collector number: this card's place in the set list. Main-set cards print it over the set's card count.
- STXSet code for Strixhaven: School of Mages
- CCommon
- ENPrinted in English
How to read a Magic card: every part and code, on real cards.
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