Sign in Blood 
Sorcery
Appears in 8,302 of 23,123 decks (35.9%).
Appears with these commanders:
| Commander | Decks ↓ | Synergy |
|---|---|---|
| Livaan, Cultist of Tiamat + Agent of the Shadow Thieves | 1 | 0.14 |
| Will-o'-the-Wisp | 1 | 0.14 |
| Safana, Calimport Cutthroat + Agent of the Iron Throne | 1 | 0.14 |
| Falthis, Shadowcat Familiar + Esior, Wardwing Familiar | 1 | 0.14 |
| Ruthless Sniper | 1 | 0.14 |
| Banshee of the Dread Choir | 1 | 0.14 |
| Mindmelter | 1 | 0.14 |
| Vile Entomber | 1 | 0.14 |
| Rix Maadi Guildmage | 1 | 0.14 |
| Moonstone Harbinger | 1 | 0.14 |
| Downwind Ambusher | 1 | 0.14 |
| Rusko, Clockmaker | 1 | 0.14 |
| Valgavoth's Faithful | 1 | 0.14 |
| Phyrexian Missionary | 1 | 0.14 |
| Vampire of the Dire Moon | 1 | 0.14 |
| Shriekmaw | 1 | -0.03 |
| Arvad the Cursed | 1 | -0.03 |
| Sarevok, Deathbringer + Feywild Visitor | 1 | -0.03 |
| Ellyn Harbreeze, Busybody + Agent of the Iron Throne | 1 | -0.03 |
| Sarevok, Deathbringer + Hardy Outlander | 1 | -0.03 |
| Halsin, Emerald Archdruid + Agent of the Iron Throne | 1 | -0.03 |
| Gloomshrieker | 1 | -0.03 |
| Painsmith | 1 | -0.03 |
| Falthis, Shadowcat Familiar + Armix, Filigree Thrasher | 1 | -0.03 |
| Gut, True Soul Zealot + Criminal Past | 1 | -0.03 |
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