Professor's Warning 
Instant
Appears in 1,349 of 28,395 decks (4.8%).
Appears with these commanders:
| Commander | Decks | Synergy ↓ |
|---|---|---|
| Reaper of Sheoldred | 1 | 0.95 |
| Yawgmoth Demon | 1 | 0.95 |
| Safana, Calimport Cutthroat + Veteran Soldier | 1 | 0.95 |
| Yathan Tombguard | 5 | 0.75 |
| Mauhúr, Uruk-hai Captain | 26 | 0.72 |
| Tenured Inkcaster | 3 | 0.7 |
| Flesh-Eater Imp | 4 | 0.62 |
| Nadier, Agent of the Duskenel + Tormod, the Desecrator | 2 | 0.62 |
| Tormented Hero | 17 | 0.57 |
| Conductor of Cacophony | 8 | 0.57 |
| Skyclave Shadowcat | 4 | 0.52 |
| Bloatfly Swarm | 4 | 0.52 |
| Kulrath Knight | 62 | 0.5 |
| Oona's Blackguard | 12 | 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 | 282 | 0.4 |
| Wilson, Refined Grizzly + Agent of the Shadow Thieves | 93 | 0.38 |
| Dalek Squadron | 14 | 0.38 |
| Ashiok's Adept | 11 | 0.38 |
| Falthis, Shadowcat Familiar + Kediss, Emberclaw Familiar | 11 | 0.36 |
| Hailstorm Valkyrie | 2 | 0.35 |
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