D&D Random Encounters - 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.

dnd5e encounters underdark

level: terrain: sources: type:

combat

1 Grick

At a fungi-covered temple to a power of madness (the area has a programmed illusion involving an agricultural scene)
They are are looking for a mate
In a fight they attack whoever looks most dangerous
Possibly... during the fight someone's weapon starts to glow with a magic effect
Difficulty... 450 Deadly

combat

1 Intellect Devourer (Monster Manual p.191)

At an area of tall mushrooms with bowl-like flammable caps and a shining mushroom garden (close to a large cave covered with inscriptions)
They are telepathic
In a fight they focus on the largest foe
Difficulty... 450 Deadly

combat

1 Intellect Devourer (Monster Manual p.191)

At a partial collapse surrounded by obsidian (there is an unexpected breeze)
They are trapped in a hole
In a fight they prefer to capture their foes
Difficulty... 450 Deadly

combat

3 Giant Centipedes

At a walkway of stepping stones over a fish-filled river (near a mossy burial chamber)
They are investigating an unusual type of fungi
In a fight they run and hide if things go badly
Possibly... during the fight a greater threat is attracted by the fighting
Difficulty... 300 Hard

combatfiend

1 Hell Hound

At a grove of mossy tall mushrooms. There is a glistening pool with something shiny with a pool with something shiny (there is smoke from a fire)
They are trapped in a rockfall
In a fight they run away as fast as they can if things go badly
Possibly... they have
Difficulty... 700 Deadly