Foul creatures dwell here. Foul creatures swarm these sites, overwhelming trespassers with sheer numbers and unchecked ferocity. The denizens do little beyond multiplying, feeding, and expanding, ravenous for fresh kills to feed the swarm.
Navigation through this place, across paths undermined by the hordes, may be perilous. The sights and smells may test your fortitude. But it is the creatures which pose the greatest threat, as they ambush and cut off your escape with unforeseen cunning.
An age-old subterranean dungeon. These subterranean structures are a mystery. They are inexplicably ancient, older perhaps than even the Firstborn. Their passages and halls hide dangers within unfathomable darkness.
Most Ironlanders stay well clear of these places. But some stumble upon the entrance to an underkeep and delve inside, drawn by its secrets or the alluring promise of forgotten power. Others, desperate for protection from the perils of the surface world, foolishly try to use the depths of an underkeep as a sanctum for their kin or clan. They soon discover that the greatest threats lie beneath.
| d100 | Feature |
|---|---|
| 1-4 | Inhabited nest |
| 5-8 | Abandoned nest |
| 9-12 | Ravaged terrain or architecture |
| 13-16 | Remains or carrion |
| 17-20 | Hoarded food |
| 21-43 | Carved passages |
| 44-56 | Hall or chamber |
| 57-64 | Stairs into the depths |
| 65-68 | Grand doorway or entrance |
| 69-72 | Tomb or catacombs |
| 73-76 | Rough-hewn cave |
| 77-80 | Foundry or workshop |
| 81-84 | Shrine or temple |
| 85-88 | Imposing architecture or artistry |
| 89-98 | Something unusual or unexpected |
| 99 | You transition into a new theme |
| 100 | You transition into a new domain |
| ^InfestedUnderkeepFeatures |
| d100 | Danger |
|---|---|
| 1-5 | Denizens swarm and attack |
| 6-10 | Toxic or sickening environment |
| 11-12 | Denizen stalks you |
| 13-14 | Denizen takes or destroys something |
| 15-16 | Denizen reveals surprising cleverness |
| 17-18 | Denizen guided by a greater threat |
| 19-20 | Denizen blocks the path |
| 21-22 | Denizen funnels you down a new path |
| 23-24 | Denizen undermines the path |
| 25-26 | Denizen lays in wait |
| 27-28 | Trap or snare |
| 29-30 | Victim’s horrible fate is revealed |
| 31-33 | Ancient mechanism or trap |
| 34-36 | Crumbling architecture |
| 37-39 | Blocked or broken passage |
| 40-42 | Artifact with a hidden danger |
| 43-45 | Denizen lurks in darkness |
| 46-57 | You encounter a hostile denizen. |
| 58-68 | You face an environmental or architectural hazard. |
| 69-76 | A discoveryundermines or complicates your quest. |
| 77-79 | You confront a harrowing situation or sensation. |
| 80-82 | You face the consequences of an earlier choice or approach. |
| 83-85 | Your way is blocked or trapped. |
| 86-88 | A resource is diminished, broken, or lost. |
| 89-91 | You face a perplexing mystery or tough choice. |
| 92-94 | You lose your way or are delayed. |
| 95-00 | Roll twice more on this table. Both results occur. If they are the same result, make it worse. |
| ^InfestedUnderkeepDangers |