Underdark Non-Combat Encounters, NPCs and Hazards for DnD 5e

"An intellect devourer is inhabiting the body of a deep gnome and claims to be the ambassador of a nearby settlement."

Tables for Non-Combat Encounters, Quick NPCs and Hazards & Obstacles for Underdark . Result is from Underdark Non-Combat Encounters.

Non-combat by terrain - arctic | jungle | road | ruins | underdark

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Underdark Non-Combat, NPCs & Hazards

Talking is also an option in the Underdark. A minotaur might want feedback on its newly created maze or an eyeless beholder might give predictions of the future. Meet NPCs from a deep gnome who can smell gems to an ogre druid who adores oozes. Deal with rockfalls or pit traps, fungal spores and flammable gas.

There is a 5e Underdark random encounter generator at ChaosGen. And a separate tool for encounter locations including Underdark.

There is also a pdf of these and more tables at the DM's Guild as Underdark Encounters.

Underdark Encounters Terrain Encounters Bundle for 5e

Underdark Encounter Tables - creatures | locations | non-combat | complications

Underdark Non-Combat Encounters

1d8+1d12Underdark Non-Combat Encounters
2 A drider spellcaster merchant has maps (or potent fungi) for sale. Makes good offers for loot of characters and can trade in favors
3 An unhappy wereboar is lost and wounded from fights with local creatures. Talks about wild parties in the moonlight.
4 An eyeless beholder is chained to a cliff and used as an oracle by local tribes. Speaks several languages and talks of far off realms.
5 A doppelganger in goblin form wants to pick delicious mushrooms. They are surrounded by deadly fungi that emit poisonous spores.
6 A pair of otyughs look for a new home. Dark, toxic and waste-filled.
7 A stone giant has lost their affinity with stone. Trying to develop a new affinity with objects, experimenting with bones, metal and fur.
8 A sentient ochre jelly (Int 12, telepathy 60 ft.) communicates mostly in images. It proposes an alliance of mutual protection.
9 A few ragged duergar are starving and downcast. Will work for food.
10 An intellect devourer is inhabiting the body of a deep gnome and claims to be the ambassador of a nearby settlement.
11 A few myconid adults are cut off from their cave of enchanted fungi. Offer great rewards in return for helping them return there.
12 A friendly minotaur (speaks Undercommon) has spent years building a puzzle maze and wants someone to try it out and give feedback.
13 An awakened bat (speaks Undercommon) offers to guide group and scout for them. Wants to be a familiar and hear tales of the surface.
14 A distraught ettin has had one head drained by intellect devourer (Int 0) and asks for help. Collapses in tears if refused or attacked.
15 Several cautious lizardfolk escaped captivity from slavers and are trying to make sense of the Underdark. Considering living here.
16 A grick alpha with an ornate collar is heavily wounded and retreats from any light. Pet of nearby creature, who is grateful for its return.
17 Several deep gnome miners try to rescue an ore cart from a collapse.
18 A fire giant has a mobile forge and offers to make repairs or items. Will trade for metal and has a friendly sidekick who talks to party
19 A docile purple worm has a magical carrying box fused with it (space for six Medium sized creatures). It waits expectantly for group.
20 A strange shadow reforms when destroyed and slowly drains light instead of life. Is very confused and glows like a driftglobe.

Underdark Quick NPCs

1d4+1d6Underdark Quick NPCs
2 Azaki is an outcast drow elite warrior who is practicing coin tricks. They are proud of coin collection and will work for new specimens.
3 Cressel is an old tiefling veteran with a style blending several cultures. They guard surface visitors and recognize one of the characters.
4 Sheris is a hermit mage (or diviner - VGtM) with a gemstone circlet. They experiment with fungi in arcane rituals and speak of many lands.
5 Duergath is a curious dwarf scout with a bat familiar. They make maps to add to their collection or trade away. Dream of owning an island.
6 Aym is a gaunt tribal warrior with unruly orange hair. They have escaped captivity twice and give advice on surviving the Underdark.
7 Riggles is a thickset deep gnome miner with a handcart. They have an acute sense of smell and use it to find gems, ore and lost items.
8 Xenia is a lucky half-ogre (or bard - VGtM) who speaks Giant, Common, Undercommon and five more languages. They are valued as a translator and have a knack for surviving dangerous situations.
9 Oloric is a missionary priest of light from the surface. They hope to convert creatures and carry many different sources of light.
10 Eri is a loud ogre (spellcasting of a druid) berating a pet yellow slime. They taste any unknown substances and love to talk about oozes.

Underdark Hazards and Obstacles

1d8+1d12Underdark Hazards and Obstacles
2 An old shrine (or cairn) that can cause a geas (or bestow curse)
3 Area of dead magic (as antimagic field) caused by weird fungi
4 There is smoke from a fire or a few beasts are infected with disease
5 A hedge (or maze) of spiky fungi (treat as razorvine; DMG pg 110)
6 There is an area of sharp stones (treat as spike stones)
7 An area of fungal spores that cause scary visions (or madness)
8 An area of thick webs (DMG pg 105) or there are tremors causing falling rocks or stalactites)
9 Poisonous (or disease-carrying) spores cover (or float in) the area
10 There is risk of a rockfall (or collapsing roof) (DMG pg 110)
11 A patch of Brown (or Yellow) Mold (DMG pg 105) or there is glowing swarm of harmless insects in the area
12 Covered simple pit (DMG pg 122) or locking pit trap (DMG pg 122)
13 There are several shriekers among similar looking fungi
14 There is a strange mist (or it is very dusty) in the area. Treat as light or heavy obscurement.
15 Tracks lead to an area of quicksand (DMG pg 110) or Swarm of Rot Grubs (VGtM) infesting a corpse
16 A disturbance of many bats (or stampede of rothe)
17 There is a pocket of flammable gas or there are tar pits (as quicksand but flammable)
18 A rolling sphere trap (DMG pg 123) or sphere of annihilation (DMG pg 122)
19 An earthquake causing fissures, rockfalls and tunnel collapses.
20 There is a flash flood or a portal to one of the elemental planes

More Encounter Tables

There is a 5e Underdark random encounter generator at ChaosGen. And a separate tool for encounter locations including Underdark.

There is also a pdf of these and more tables at the DM's Guild as Underdark Encounters.

Underdark Encounters Terrain Encounters Bundle for 5e

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