Professor's Warning
Instant
STXStrixhaven: School of Mages#84common
Foil
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familiar with the rise of tyrants.
- Border
- black
- Frame
- 2015
- Pull rate
- about 1 per booster–1 in 525
- Illustrator
- Kieran Yanner
- Found in
- Strixhaven School of Mages MTGO Redemption Foil · Strixhaven School of Mages MTGO Redemption · 7 more
CommanderLegalModernLegalStandardNot legal
Format legality
AlchemyNot legal
BrawlLegal
CommanderLegal
Competitive BrawlLegal
DuelLegal
Future StandardNot legal
GladiatorLegal
HistoricLegal
LegacyLegal
ModernLegal
OathbreakerLegal
Old SchoolNot legal
PauperLegal
Pauper CommanderLegal
PennyLegal
PioneerLegal
PreDHNot legal
PremodernNot legal
StandardNot legal
Standard BrawlNot legal
TimelessLegal
Tiny LeadersLegal
VintageLegal
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.)
Plays as: Counter Placer · Modal Spell · Protection Spell
Market · per finishspark updated 10h ago · prices as of 2026-07-12
Nonfoil+10.5%
$0.21
$0.02 low$0.01 gap
Foil+0.0%
$0.31
$0.08 low$0.00 gap
Finish
Market
Δ 7D · Trend
Low
Buylist
Buy / Sell Gap
Nonfoil
$0.21as of 2026-07-12
+10.5%
H $0.35L $0.04since Feb 2024$0.02
$0.01
$0.01+50% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Foil
$0.31as of 2026-07-12
+0.0%
H $0.32L $0.14since Feb 2024$0.08
$0.08
$0.000% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Cheapest playable copy$0.21· across 1 printing