| Name | Class | C. | Type | Icons | Traits | Set | Encounter |
|---|---|---|---|---|---|---|---|
| Abyssal Trench | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 41 | The Drowned Quarter 6-8 | ||
| Ancient Gallery | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 48 | The Drowned Quarter 15 | ||
| Barrier Core: Inactive | Mythos | Location | Seafloor. Central. | The Drowned City Campaign Expansion 40 | The Drowned Quarter 5 | ||
| Barrier Node: Energy Shield | Neutral | Asset | Item. Artifact. R'lyeh. | The Drowned City Campaign Expansion 52 | The Drowned Quarter 21 | ||
| Blasted Ruins: Sunken Circle | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 44 | The Drowned Quarter 11 | ||
| Blasted Ruins: Crumbling Edifices | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 45 | The Drowned Quarter 12 | ||
| Collapsing Dome | Mythos | Agenda | The Drowned City Campaign Expansion 38 | The Drowned Quarter 3 | |||
| Coral Reef: Statuary Garden | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 46 | The Drowned Quarter 13 | ||
| Coral Reef: Feeding Grounds | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 47 | The Drowned Quarter 14 | ||
| Drowned Acropolis: Ephemeral Ruins | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 42 | The Drowned Quarter 9 | ||
| Drowned Acropolis: Collapsed Ruins | Mythos | Location | Seafloor. | The Drowned City Campaign Expansion 43 | The Drowned Quarter 10 | ||
| Medusa | Mythos | Enemy | Monster. | The Drowned City Campaign Expansion 51 | The Drowned Quarter 18-20 | ||
| Obsidian Relic [tdc_rune_y]: Puzzling Effigy | Neutral | Asset | Item. Relic. Glyph. | The Drowned City Campaign Expansion 50 | The Drowned Quarter 17 | ||
| Reactivate the Core | Mythos | Act | The Drowned City Campaign Expansion 39 | The Drowned Quarter 4 | |||
| The Drowned Quarter | Mythos | Scenario | The Drowned City Campaign Expansion 36 | The Drowned Quarter 1 | |||
| The Sunken Ruins | Mythos | Agenda | The Drowned City Campaign Expansion 37 | The Drowned Quarter 2 | |||
| Undersea Parasite [tdc_rune_x] | Mythos | Enemy | Monster. Glyph. Elite. | The Drowned City Campaign Expansion 49 | The Drowned Quarter 16 |