D&D Random Encounters for 5E - Underdark

Encounters might be a meeting with a patrol of guards at an old shrine or a familiar looking for aid. It might be an ambush in the wilderness, a stand-off in the city or a monster in the Underdark.
The Underdark is a place of twisting tunnels, constant darkness and strange magic. Encounters might occur in a forest of fungi, amid giant stalactites or by the side of a gaping chasm. It is a place of elemental earth and gates to far realms. Home to fungi creatures, the dark elves and aberrations from the Far Realms.

tools for - dnd5e encounters underdark

level: party size: terrain: sources: type:

combatmodron

A group of modrons

4 Monodrones (Monster Manual p.224)
3 Duodrones (Monster Manual p.225)

At an area of mold (by an abandoned crystal stairway)
They are trapped in a hole
In a fight they single out the foes with least armor
Possibly... they have
Difficulty... 625.0 Deadly

combatshadow

1 Poltergeist (Monster Manual p.279 (variant))

At a crystal stairway (which is associated with aberrations)
They are eating
In a fight they fight to the bitter end
Possibly... during the fight someone notices a large fire nearby
Difficulty... 450 Deadly

combatogre

2 Half-Ogres (Monster Manual p.238) led by one named Ermo

At a pond with many insects surrounded by exposed rock (there is a scent of something strange lingering in the air)
They are blocking up a tunnel
In a fight they run away if things start going badly
Possibly... during the fight it gets windier
Difficulty... 600.0 Deadly

combatvermin

2 Giant Wasps

At an area of edible fungal flowers (which is a dead magic zone (similar to an antimagic field))
They are watching a secret entrance
In a fight they attack whoever is nearest
Difficulty... 300.0 Hard

combatfungi

5 Violet Fungi
3 Shriekers
1 Myconid Adult (Monster Manual p.232)
1 Vulture

At an area of purple edible lichen. There is a spiderweb covered hole to a watery cavern with a few pale gnarled trees (nearby is a murky lake shore with a water geyser repeating frequently)
They are foraging for fungi
In a fight they run away if things start going badly
Possibly... they have 1d3 doses of carrion crawler mucus
Difficulty... 780 Deadly