Professor's Warning 
Instant
Appears in 1,201 of 24,987 decks (4.8%).
Appears with these commanders:
| Commander | Decks | Synergy ↓ |
|---|---|---|
| Oona's Blackguard | 11 | 0.45 |
| Nested Ghoul | 2 | 0.45 |
| Battlefield Butcher | 1 | 0.45 |
| Black Knight | 1 | 0.45 |
| Blood Hustler | 1 | 0.45 |
| Demonic Taskmaster | 1 | 0.45 |
| Shirei, Shizo's Caretaker | 240 | 0.4 |
| Wilson, Refined Grizzly + Agent of the Shadow Thieves | 83 | 0.38 |
| Dalek Squadron | 12 | 0.38 |
| Ashiok's Adept | 10 | 0.38 |
| Falthis, Shadowcat Familiar + Kediss, Emberclaw Familiar | 9 | 0.36 |
| Hailstorm Valkyrie | 2 | 0.35 |
| Unforgiving One | 11 | 0.33 |
| Feaster of Fools | 4 | 0.32 |
| Falthis, Shadowcat Familiar + Dargo, the Shipwrecker | 5 | 0.31 |
| Kalakscion, Hunger Tyrant | 4 | 0.29 |
| Sarevok, Deathbringer + Guild Artisan | 3 | 0.29 |
| Sarevok, Deathbringer + Feywild Visitor | 1 | 0.29 |
| Painsmith | 1 | 0.29 |
| Falthis, Shadowcat Familiar + Armix, Filigree Thrasher | 1 | 0.29 |
| Innocent Traveler // Malicious Invader | 1 | 0.29 |
| Crowd of Cinders | 1 | 0.29 |
| Tor Wauki the Younger | 128 | 0.25 |
| Bloodsworn Squire // Bloodsworn Knight | 2 | 0.24 |
| Xathrid Slyblade | 2 | 0.24 |
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