Sign in Blood 
Sorcery
Appears in 10,520 of 29,449 decks (35.7%).
Appears with these commanders:
| Commander | Decks ↓ | Synergy |
|---|---|---|
| Dreadwing | 1 | -0.27 |
| Tomebound Lich | 1 | -0.28 |
| Rona, Disciple of Gix | 1 | -0.28 |
| Amber Gristle O'Maul + Agent of the Shadow Thieves | 1 | -0.29 |
| Armix, Filigree Thrasher + Esior, Wardwing Familiar | 1 | -0.29 |
| Mundungu | 1 | -0.29 |
| Alora, Merry Thief + Agent of the Shadow Thieves | 1 | -0.29 |
| Sivriss, Nightmare Speaker + Feywild Visitor | 1 | -0.29 |
| Forerunner of Slaughter | 1 | -0.29 |
| Contraband Kingpin | 1 | -0.3 |
| Corpse Appraiser | 1 | -0.3 |
| Grixis Battlemage | 1 | -0.33 |
| Marsh Crocodile | 1 | -0.33 |
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