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:

combatvermin

1 Giant Scorpion

At a river with a small island (it is associated with a powerful dark elf)
They are exploring a secret entrance
In a fight they attack whoever is causing them the most pain
Difficulty... 700 Deadly

combatfungi

4 Violet Fungi
3 Shriekers
1 Myconid Sprout (Monster Manual p.230)

At a deep ravine (there are several mushrooms covered in a tar-like substance)
They are searching for traps
In a fight they focus all their attention on the most dangerous warrior
Possibly... during the fight liquid spills from somewhere
Difficulty... 480 Deadly

combatsnake

A nest (group) of snakes

1 Constrictor Snake
1 Flying Snake
1 Poisonous Snake

At an iridescent chasm and a sheltered crystal statue (nearby is a small beast pen)
They are are hunting something
In a fight they attempt to use the terrain to attack with stealth
Possibly... during the fight someone betrays an ally
Difficulty... 200 Medium

combatvermin

1 Giant Scorpion

At a platform moved by levers and a pile of sand (close by is a rune-covered marble slab)
They are stalking something
In a fight they attack whoever is largest
Possibly... during the fight a third group of combatants join in
Difficulty... 700 Deadly

combatrat

A pack of rats

6 Giant Rats
3 Rats

At a narrow river with a verdant island (which is associated with a plane of water)
They are are making a new home or lair
In a fight they all attack the same foe
Possibly... they have a Potion of Poison
Difficulty... 360 Hard

combat

4 Giant Lizards

At a crude raft on a lake shore (there is a scent of something decaying)
They are trapped in a rockfall
In a fight they attack whoever is nearest
Possibly... they have 1d4 small rubies in a green bottle (100 gp each)
Difficulty... 400 Deadly

combatfrog

1 Giant Toad
1 Giant Frog

At a patch of edible fungi and a foreboding statue with a secret compartment (by a set of stone steps leading up a steep slope)
They are angry about something
In a fight they run and hide if things go badly
Possibly... they have a Bag of Holding
Difficulty... 375.0 Hard

combatmodron

A group of modrons

7 Monodrones (Monster Manual p.224)
1 Duodrone (Monster Manual p.225)

At a low cave with large stalagmites and stalactites. There is a mysterious rope bridge with a stalactite ready to fall (nearby is an a foreboding statue joined to an oak statue)
They are collecting from a water source
In a fight they focus all their attention on the most heavily armored foes
Possibly... during the fight a stranger arrives and watches
Difficulty... 562.5 Deadly

combat

1 Grick

At an area of carved tunnels. There is an electrified metal door with a powerful spring (there is a strong smell of something bitter)
They are exploring a secret entrance
In a fight they attack whoever is causing them the most pain
Possibly... they have an Immovable Rod
Difficulty... 450 Deadly

combatspider

A group of spiders

1 Swarm of Spiders (Monster Manual p.338)
3 Giant Wolf Spiders

At a stream (there is an overturned handcart)
They are investigating an unusual type of fungi
In a fight they keep away from anyone with religious icons
Possibly... during the fight a fire starts
Difficulty... 500 Deadly