Professor's Warning 
Instant
Appears in 1,349 of 28,395 decks (4.8%).
Appears with these commanders:
| Commander | Decks | Synergy ↓ |
|---|---|---|
| Infesting Radroach | 2 | 0.15 |
| Knight of Dusk's Shadow | 1 | 0.15 |
| Bloodthirsty Aerialist | 1 | 0.15 |
| Black Waltz No. 3 | 39 | 0.14 |
| Yargle, Glutton of Urborg | 10 | 0.13 |
| Osseous Sticktwister | 7 | 0.13 |
| Sarevok, Deathbringer + Agent of the Shadow Thieves | 2 | 0.13 |
| Esper Battlemage | 1 | 0.12 |
| Sarevok, Deathbringer + Agent of the Iron Throne | 1 | 0.12 |
| Erinis, Gloom Stalker + Agent of the Iron Throne | 1 | 0.12 |
| Catacomb Sifter | 1 | 0.12 |
| Gastal Thrillseeker | 1 | 0.12 |
| Judge Magister Gabranth | 1 | 0.12 |
| Crypt Rats | 17 | 0.11 |
| Souls of the Faultless | 5 | 0.11 |
| Nazar, the Velvet Fang | 3 | 0.11 |
| Amber Gristle O'Maul + Agent of the Shadow Thieves | 2 | 0.09 |
| Sivriss, Nightmare Speaker + Street Urchin | 1 | 0.09 |
| Monoxa, Midway Manager | 1 | 0.09 |
| Nadier, Agent of the Duskenel + Malcolm, Keen-Eyed Navigator | 1 | 0.09 |
| Shadewing Laureate | 1 | 0.09 |
| Ancient Lumberknot | 10 | 0.08 |
| Plague Spitter | 3 | 0.08 |
| Rograkh, Son of Rohgahh + Falthis, Shadowcat Familiar | 1 | 0.08 |
| Gothmog, Morgul Lieutenant | 1 | 0.08 |
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