5e D&D Combat Encounters - Underdark

Combat Encounters include creature groups, hazards and lone npcs. Maybe a lost lizardfolk, a forest fire or a talkative druid
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

A group of kobolds

4 Winged Kobolds (Monster Manual p.195) led by one named Geth
2 Kobolds
4 Giant Fire Beetles

At a glittering cliff (which is influenced by a plane of water)
They are mining
In a fight they swarm foes with expensive looking gear
Difficulty... 580 Deadly

combatillithid

1 Intellect Devourer (Monster Manual p.191)

At a fish-filled pool and a fish-filled stream fed by a spring (it is misty)
They are are scouting the area
In a fight they focus on any obvious spellcaster
Possibly... during the fight someone's weapon starts to glow with a magic effect
Difficulty... 450 Deadly

combatvermin

1 Carrion Crawler (Monster Manual p.37)

At a quartz column (close by is a line of clay statues)
They are telepathic
In a fight they run and hide if things go badly
Possibly... during the fight a third group of combatants join in
Difficulty... 450 Deadly

combatvermin

1 Ankheg

At a polluted waterfall (nearby is the fresh corpse of a bat)
They are mutated in some way
In a fight they attack whoever is causing them the most pain
Possibly... they have a pair of Boots of Springing and Striding
Difficulty... 450 Deadly

combatgoblin

3 Goblins

At a large rock by a vertical shaft (by a tunnel-ridden cave with large stalagmites and stalactites)
They are foraging for fungi
In a fight they quickly retreat and try attacking again from ambush
Possibly... during the fight a trap is sprung
Difficulty... 300 Hard

combatvermin

4 Giant Centipedes

At an ugly gorge (the area is associated with a powerful mould)
They are cursed
In a fight they attack whoever is causing them the most pain
Difficulty... 400 Deadly

combat

3 Kuo-toa (Monster Manual p.199)
1 Kuo-toa Whip (Monster Manual p.200)

At a narrow canyon and a gloomy shrine to a forgotten power (there is a rope ladder)
They are studying inscriptions
In a fight they attempt to use the terrain to attack with stealth
Possibly... they have a Helm of Telepathy
Difficulty... 700 Deadly

combatfungi

4 Violet Fungi
3 Myconid Sprouts (Monster Manual p.230)

At a partial collapse near a rectangular trench (nearby is a large mushroom-filled pool fed by a spring)
They are hiding from a nearby light source
In a fight they focus on any obvious spellcaster
Difficulty... 460 Deadly

combat

1 Water Weird (Monster Manual p.299)

At a turbulent lake shore with a water geyser repeating frequently (there is a lever here)
They are in need of help
In a fight they avoid the largest foe
Possibly... during the fight someone has a vision of the future
Difficulty... 700 Deadly

combatearth

1 Basilisk

At a forest of glowing reddish mushrooms in long shelves (near a strange bridge across a sparkling stream)
They are cursed
In a fight they run away as fast as they can if things go badly
Possibly... they have a Potion of Water Breathing
Difficulty... 700 Deadly