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 Merrow

At a tunnel entrance and a decorated statue (close by is a patch of edible sea anemones)
They are exploring a cave mouth
In a fight they try to capture the foe that stands out most
Possibly... during the fight it gets windier
Difficulty... 450 Deadly

combat

1 Killer Whale

At an eerie monument (which is blessed by a power of water)
They are adapted to darkness
In a fight they attack whoever is nearest
Possibly... they have a Potion of Animal Friendship
Difficulty... 700 Deadly

combatseamonster

1 Merrow

At an area of dead algae (which is associated with a magical tentacled monster)
They are are looking for a new home or lair
In a fight they combine ranged attacks at foes with ranged weapons
Difficulty... 450 Deadly

combat

2 Giant Octopi

At a seaweed-covered cliff and a cave entrance blocked by sticky seaweed (a forceful current flows through the area)
They are curious about a nearby light source
In a fight they run and hide if things go badly
Possibly... during the fight someone slips over
Difficulty... 600.0 Deadly

combat

2 Giant Sea Horses

At a patch of bright coral near a wide hole (nearby is a narrow chasm)
They are are fleeing a natural disaster or other event
In a fight they all attack the same foe
Possibly... they have 2d6 holy symbols of various sea deities
Difficulty... 300.0 Hard