| Name | Class | C. | Type | Icons | Traits | Set | Encounter |
|---|---|---|---|---|---|---|---|
| Ancestral Fear | Mythos | Treachery | Terror. | The Forgotten Age 93 | Forgotten Ruins 3-4 | ||
| Brood of Yig | Mythos | Enemy | Humanoid. Monster. Serpent. | The Forgotten Age 83 | Agents of Yig 1-3 | ||
| Creeping Poison | Mythos | Treachery | Poison. | The Forgotten Age 101 | Poison 1-2 | ||
| Curse of Yig | Mythos | Treachery | Curse. | The Forgotten Age 85 | Agents of Yig 5-6 | ||
| Deep Dark | Mythos | Treachery | Hazard. | The Forgotten Age 94 | Forgotten Ruins 5-7 | ||
| Entombed | Mythos | Treachery | Trap. | The Forgotten Age 89 | Deadly Traps 4-5 | ||
| Fang of Yig | Mythos | Enemy | Humanoid. Monster. Serpent. | The Forgotten Age 98 | Yig's Venom 1-2 | ||
| Final Mistake | Mythos | Treachery | Trap. | The Forgotten Age 88 | Deadly Traps 1-3 | ||
| Ill Omen | Mythos | Treachery | Omen. Terror. | The Forgotten Age 92 | Forgotten Ruins 1-2 | ||
| Poisoned | Neutral | Treachery | Poison. | The Forgotten Age 102 | Poison 3-6 | ||
| Serpent from Yoth | Mythos | Enemy | Humanoid. Monster. Serpent. | The Forgotten Age 84 | Agents of Yig 4 | ||
| Serpent's Call | Mythos | Treachery | Power. | The Forgotten Age 100 | Yig's Venom 5 | ||
| Snakescourge | Mythos | Treachery | Curse. | The Forgotten Age 99 | Yig's Venom 3-4 |