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:

combat

1 Githzerai Monk (Monster Manual p.161)

At a farm of edible tall grey-stalked mushrooms. There is a shallow trench with a fish-filled pool with many frogs (there is a foul stench in the air)
They are trapped in a rockfall
In a fight they act in a disciplined manner
Difficulty... 450 Deadly

combat

4 Giant Centipedes

At an inscribed shale slab surrounded by debris (close by is an area of carved tunnels)
They are marked by a deity of earth
In a fight they attack whoever is causing them the most pain
Possibly... they have 1d4 small rubies in a green bottle (100 gp each)
Difficulty... 400 Deadly

combat

1 Ghast

At a narrow ravine. There is a garden of mysterious mushrooms emitting a thick cloud of spores with a pool with a patch of phosphorescent edible moss (oddly, there is a pile of leaves)
They are fleeing a nearby danger
In a fight they focus on the largest foe
Possibly... they have a pair of silver coated pickaxes with handles covered in cloaker hide (300 gp each)
Difficulty... 450 Deadly

combatgoblin

4 Goblins

At a strange temple to a power of secrets and a pool with a garden of rope-like tan fungi (there is a wanted poster for a murderer)
They are close to death
In a fight they quickly retreat and try attacking again from ambush
Possibly... during the fight something isn't where it is supposed to be
Difficulty... 400 Deadly

combatvermin

1 Ankheg

At a partial collapse (nearby is a sparkling pool with many frogs with many lizards)
They are watching a secret entrance
In a fight they attack whoever looks most dangerous
Possibly... they have an Eversmoking Bottle
Difficulty... 450 Deadly