Underwater Encounter Tables VGtM = Volo's Guide to Monsters. Underwater Encounters (Levels 5-10) MToF = Mordenkainen's Tome of Foes d8+d12 A Note on Water Breathing 2 1 marid or 1 morkoth (VGtM) To expand options some stats and creatures are adapted 3 1d3+1 giant sharks from other environments. These may need a way of water 4 2d6+2 sahuagin led by a sahuagin baron or roll on Sahuagin lvl 5-10 breathing to survive underwater. 5 1d4+1 giant constrictor snakes or 1 hydroloth (MToF) The water breathing spell lasts for 24 hours or several magic items grant water breathing, including cap of water 6 A coven of 3 sea hags or roll on Underwater Spirits lvl 5-10 3d6 sahuagin and 1d3 sahuagin priestesses or 1 mage with water breathing, cloak of the manta ray, necklace of adaptation and 7 ring of water elemental command breathing served by 1 water elemental myrmidon (MToF) Lastly, any creature can be made aquatic by giving it a 8 1d4 water elementals or roll on Underwater Spirits lvl 5-10 swim speed equal to its walking speed and the amphibious 9 4d6 merfolk with 3d6 giant seahorses ability. 10 2d6 sahuagin and 1d4+1 hunter sharks or roll on Sahuagin lvl 5-10 Amphibious. This creature can breathe air and water 11 Roll on Underwater Levels 1-4 table or 3d6 sea spawn (VGtM) 12 1d4+2 killer whales 13 1d2 hydras or roll on Underwater Monsters lvl 5-10 14 1d4+1 chuuls or 2d6 hunter sharks 1 sea troll (swim 30 ft.) with 1d6 merrow or roll on Underwater 15 Monsters lvl 5-10 2d6 plesiosauruses or 1 kraken priest (VGtM) with 1d4 cult fanatics 16 (with water breathing) 17 1 aboleth or roll on Underwater Monsters lvl 5-10 18 1 sea hag and 2d4 merrow 1 young black dragon or 1 kraken priest (VGtM) with 1d4+1 deep 19 scions (VGtM) 20 1 storm giant Underwater Encounters (Levels 11+) Underwater Encounters (Levels 1-4) d8+d12 d8+d12 2 1 adult black dragon or 1 leviathan (MToF) 2 1 giant shark or 1 kraken priest (VGtM) 3 1 kraken 3 1d3 plesiosauruses or 1 sea hag with 1d2 sea spawn (VGtM) 4 2 young black dragons or roll on Underwater Monsters lvl 11+ 4 1d4 sahuagin with 1 sahuagin priestess or roll on Sahuagin lvl 1-4 5 4d6 merrow or 1 storm giant quintessent (VGtM) 5 2d6 giant crabs or roll on Underwater Beasts 6 1 aboleth with 2d4 chuuls or roll on Underwater Monsters lvl 11+ 6 1d2 chuul or roll on Underwater Monsters lvl 1-4 7 3d6 killer whales or 1 wastrilith (MToF) 7 1d4+1 reef sharks or roll on Underwater Beasts 8 1d3 marids or roll on Underwater Monsters lvl 11+ 8 1d3 sahuagin and 1d3 reef sharks or roll on Sahuagin lvl 1-4 9 2d4 giant sharks or 1d2 aboleth 9 1d3 giant octopi or roll on Underwater Beasts 10 1 dragon turtle or roll on Underwater Monsters lvl 11+ 10 1d2 merrow or roll on Underwater Monsters lvl 1-4 11 Roll on Underwater Levels 5-10 table or 1 morkoth (VGtM) 11 2d6 giant seahorses or roll on Underwater Beasts 4d6 sahuagin and 1d4+2 sahuagin priestesses led by a sahuagin 12 12 2d6 merfolk or roll on Underwater Humanoids baron 13 1d3 killer whales or 3d6 dolphins (VGtM) 13 1 storm giant with 1d3 killer whales 14 2d4 steam mephits or roll on Underwater Spirits lvl 1-4 14 2d4+2 sahuagin priestesses each with a Hunter Shark 15 1d3 hunter sharks or 1d4 sea spawn (VGtM) 15 2d4 water elementals or 1 archduid (VGtM) 2d4 merfolk with 2d4 giant sea horses or roll on Underwater 16 16 1d3 storm giants Humanoids 1 marid and 1d4 water elementals or 1 archduid (VGtM) with... (roll 17 1d3 swarms of quippers or 1 deep scion (VGtM) 17 Sampleon Beast Encounters) file 1 sea hag and 1d2 swarms of quippers or roll on Underwater Spirits 18 18 1 sahuagin baron and 1d4+2 giant sharks lvl 1-4 19 1 archmage and 1d6 gladiators with water breathing 19 1 giant constrictor snake or 1 druid 20 1 empyrean or 1 lich 20 1 water elemental or 1 sea elf spirit (banshee stats) 2 Location Tables Underwater Semi-Civilized Locations In italics are optional extra details. Use Wilderness, Semi-Civilized or Unusual table for an encounter location. d8+d12 A sunken temple to a power of strength. There is a garden of The Underwater Location Detail and Underwater Combat 2 Terrain can be used to customize the location. colorful seaweed (there is a stationary pocket of air) A carved monument with lawns of ornamental sea grass (there is a 3 programmed illusion here) 4 A line of statues surrounded by rock (nearby is an ornate tomb) Underwater Edge of Wilderness Locations A coral-carved hall with a patch of sea anemones (the area is 5 In italics are optional extra details. associated with a magical tentacled monster) A pillar of stone surrounded by sand (which is associated with d8+d12 6 whales) An ugly crevasse in an area of black kelp (near a permanent A garden of pretty sea plants and an underwater cave entrance (a 2 7 maelstrom) bright light is in the area) A shallow trench on a sunken island and a wide sea cave entrance (it 3 A stone mosaic and a patch of cultivated seaweed (there is a sunken 8 is touched by druidic magic) fishing boat) 4 A sparkling canyon (there are several sea flowers) An algae-covered shell mosaic near a seaweed garden (a forceful 9 5 An area of dead coral (nearby is a mound of shells) current pulls creatures upward) A rock reef by a patch of sea mushrooms (there is the corpse of a 10 A decorated shipwreck (nearby is a wide crevasse) 6 sea hag) 11 A coral-carved hall with a statue (it is protected by a sea spirit) 7 A shallow trench and a dying kelp garden (close by is a shipwreck) An edible kelp garden near a shell mosaic (by a sandy surface on 12 8 An area of sea anemones (close by is a pile of rocks) coral) A patch of bright sea grass surrounded by shells (there is a harmless An unusual line of statues and a pile of seaweed (many coloured 9 13 group of seahorses approaching) lights are in the area) A narrow chasm and a algae-covered rock (a strong current flows A sparkling statue by a hidden carved underwater cave (there is an 10 14 through the area) inquisitive group of crabs approaching) A pile of red seaweed by a deep hole (there is a harmless group of A steep slope with a seaweed garden (there is a seaweed-covered 11 15 fish approaching) barrel) A bed of kelp with a mound of dead seaweed (there are a few 16 A statue of a sea deity (the marine wildlife has disappeared) 12 unusual rocks) 17 A cairn in a large pocket of air (nearby is an undersea mountain) 13 A glowing sea cave entrance (many coloured lights are approaching) A sunken ruins with a kelp-covered shrine to a forgotten power 18 An algae-covered rock and a patch of edible seaweed (nearby are a (nearby is an oyster reef) 14 few underwater cave entrances) An area of living coral by a group of tentacled statues (there are a 19 A meadow of pink sea plants (there is a mass of rotting bodies few clams) 15 chained together) A shrine to several deities made from a shipwreck (the area is 20 16 A pair of sea cave entrances (they are watched by a ghost) blessed by a power of chaos) An area of white sand littered with shells (the area is disguised by a 17 hallucinatory terrain) 18 An undersea mountain (a forceful current pulls creatures downward) 19 A broken cliff by a patch of shells (someone has left a net) 20 A skeleton of an ancient sea titan (it is associated with octopi) Sample file 3 Underwater Location Detail Underwater Unusual Locations Minor details to add to other locations d8+d12 A sparkling coral tomb of a storm giant built into an undersea 2 d8+d12 mountain. Sometimes it shakes with rumbling noises. 2 A thorny patch of bright seaweed A cave entrance lined with draconic runes. A dormant mechanism is 3 3 A recently dug hole located here along with many large bones. 4 An underwater beacon Spear of the Ancients. A gigantic trident protrudes from the seabed. 4 It is adorned with seaweed and used as a shrine to a hunting deity. 5 An illusion of several surface beasts A beautiful structure built from bone and shells surrounded by a 6 A stone statue of a sea deity 5 circle of pillars. A warrior from the surface died here. 7 Several sea urchins or a lawn of sea grass A grand seaweed maze cursed by a powerful ghost. It is bound to 8 A patch of sea anemones 6 wander its many paths and ask many questions of visitors. 9 Several large red sea mushrooms Hulk of a sunken ship with a arcane metal device. There is a portal 7 10 Many long strands of bright seaweed to the Shadowfell (or Limbo) which attracts strange creatures. 11 A garden of shells Garden of Above and Below. A strange garden of shells and objects 8 12 Area of sahuagin bones from the surface.