Price updates are limited. Some displayed estimates may be older. See each card’s price history for context.
Magic: The Gathering · commonLive pricing
Professor's Warning
Trending Up+14.3%Strixhaven: School of Mages, 2021 · #84
Professor's Warning's Near Mint price is down 5.9% ($0.02) over the past 30 days.
Fresh· Updated Nov 1, 2026
Card Details
TypeInstant
Mana CostB
ArtistKieran Yanner
Card TextChoose 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
ModernPioneerCommanderPauperLegacyVintageHistoricBrawl
inkwell Fair Value™?· NM
$0.32
moderate
$0.31$0.35
Condition?
Confidencehigh
Prices as ofNov 1
Normal—
Cheapest printing—
Why This Price
inkwell Estimate
Fair Value$0.32
Movement
7D Change+14.3% (+$0.04)
30D Change-5.9% (-$0.02)
Freshness
Prices as ofNov 1
Update cadenceDaily
Inkwell Fair Value$0.32
Buy this card Affiliate link — inkwell may earn a commission. Learn more
More from Strixhaven: School of Mages
See all cards →
- How much is Professor's Warning worth?
- The current Near Mint price for Professor's Warning from Strixhaven: School of Mages (Magic: The Gathering) is $0.32. It has increased 14.3% over the past 7 days.
- What set is Professor's Warning from?
- Professor's Warning is from the Strixhaven: School of Mages set, released April 2021. It is a common in Magic: The Gathering.
- What rarity is Professor's Warning?
- Professor's Warning is a common card from Strixhaven: School of Mages in Magic: The Gathering.
- How has the price of Professor's Warning changed over the past 30 days?
- Over the past 30 days, the Near Mint price of Professor's Warning has fallen 5.9% ($0.02) to $0.32.