D&D Random Encounters for 5E - Underwater

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.
Encounters underwater bring visions of murky seas, vast reefs and dark depths. They might occur in a kelp bed, an underwater cave or by a long-forgotten shipwreck

tools for - dnd5e encounters underwater

level: party size: terrain: sources: type:

combatseamonster

1 Plesiosaurus

At an ivy-covered sunken ruins (there is many long strands of bright seaweed)
They are adapted to darkness
In a fight they attack whoever is nearest
Possibly... they have 2d4 waterproof ceramic and glass lanterns capable of working underwater (50 gp each)
Difficulty... 450 Deadly

combat

1 Sea Hag

At a patch of glowing coral near a pile of debris (nearby is a patch of dead coral)
They are exploring a cave mouth
In a fight they surrender if things go badly
Possibly... during the fight someone notices a large fire nearby
Difficulty... 450 Deadly

combat

2 Swarms of Quippers

At a cave entrance blocked by sticky seaweed by an ancient statue (there is the bones of a fish)
They are watching a cave mouth
In a fight they attack at random
Possibly... during the fight a tremor shakes the ground
Difficulty... 600.0 Deadly

combat

1 Killer Whale

At a patch of cultivated coral surrounded by rock (someone has left a spear)
They are a shapechanger
In a fight they attack whoever is nearest
Possibly... during the fight a stranger arrives and watches
Difficulty... 700 Deadly

combat

1 Giant Octopus

At a barren slope (which is associated with clams)
They are investigating a dead body
In a fight they attack whoever looks most dangerous
Possibly... they have a Potion of Animal Friendship
Difficulty... 200 Medium