Professor's Warning
Illustrated by Kieran Yanner
Card details
- Mana cost
- 1
- Rarity
- Instant
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.)
Flavor
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familar with the rise of tyrants.
Professor's Warning price & value
| Condition | Market | Low |
|---|---|---|
| Near Mint | $0.33 | $1.59 |
| Lightly Played | $0.14 | $1.56 |
| Moderately Played | $0.16 | $1.64 |
| Heavily Played | — | $1.84 |
| Damaged | — | $7.99 |
Snapshot as of 2026-09-12. Live prices & recent sales load below.