Environment Tables (Sunken Rlyeh Deep Water Supplement)

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The following tables are the deep water encounter tables for the Sunken Rlyeh environment.

Deep Water Encounters

This table is for deep water encounters of the Prime Material Plane, above the gate to the Elemental Plane of Water and "Sunken Rlyeh". Or it could be used for any deep water oceanic adventure. The DM may elect to select and prepare encounters in advance, or assign a probability of encounters in a given time interval, or mandate a randomly selected encounter If duplicate random encounters occur, reroll.

d12 Party Level 5-8 Party Level 9-12 Party Level 13-16 Party Level 17-20 Party Level 21+
1 3 Deep Ones (5e Race) 5 Deep Ones (5e Race) 1 Great Water Elemental 2 Great Water Elementals 3 Great Water Elementals
2 3 Giant Octopi 6 Giant Octopi 9 Giant Octopi 1 Colossal Octopus 1 Sea Serpent
3 1 Merfolk Stormbrewertd> 2 Merfolk Stormbrewers 1 Sinii Krai 2 Sinii Krai 1 Cachalot
4 1 Eye of the Deep 2 Eye of the Deep 4 Eye of the Deep 1 Con Rit 1 Krakentua
5 2 Elder Things 4 Elder Things 6 Elder Things 1 Hammerclaw Crab 1 Kraken
6 2 Eurypterid 4 Eurypterid 1 Young Orange Dragon 1 Adult Orange Dragon 1 Ancient Orange Dragon
7 1 Tentacle Devil 2 Tentacle Devils 4 Tentacle Devils 6 Tentacle Devils 1 Pearl Titan
8 2 Amphisbaena 4 Amphisbaena 1 Aboleth 1 Colossal Squid 1 Laernean Hydra
9 1 Deep One Priest of Dagon 1 Young Green Dragon 1 Adult Green Dragon 1 Adult and 1 Young Green Dragon 1 Ancient Green Dragon
10 2 Sea Hags 1 Water Elemental 2 Water Elementals 3 Water Elementals 4 Water Elementals
11 2 Sea Slime 3 Sea Slime 4 Sea Slime 1 Silver Giant 2 Silver Giants
12 3 Merfolk Hunters roll twice in next lowest column roll twice in next lowest column roll twice in next lowest column roll twice in next lowest column

Instructions: Party Level assumes a balanced party of four characters in the level range shown. DM may adjust encounter strength as appropriate. Creatures encountered do not have any wealth on their persons except for the following: Deep Ones as described below; Merfolk, Tentacle Devils, and Sea Hags each have 10% of their XP value in gold, gems, or jewelry items.


Deep Water Encounter Descriptions
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AbolethIntelligent and capable, the Aboleth is in the area watchful for those seeking the gate to the Elemental Plane of Water. It will take advantage for food or profit.
Adult Green Dragon The Adult Green Dragon periodically comes up from Rlyeh to hunt, increase its treasure stash, or generally cause trouble. It has minions in Rlyeh to guard its hoard while it is away.
Adult Orange DragonThe Adult Orange Dragon is a narcissistic bully, and will attempt to intimidate a party using bluster and insults. His goal is to profit from any encounter, not necessarily to fight or kill. He loves to be worshipped or flattered.
Amphisbaena Ever hungry, Amphisbaena will attack for food but will beat a hasty retreat if their prey are well able to defend themselves.
Ancient Green Dragon The Ancient Green Dragon periodically comes up from Rlyeh to hunt, increase its treasure stash, or generally cause trouble. It has minions in Rlyeh to guard its hoard while it is away.
Ancient Orange DragonThe Ancient Orange Dragon is a narcissistic bully, and will attempt to intimidate a party using bluster and insults. His goal is to profit from any encounter, not necessarily to fight or kill. He loves to be worshipped or flattered.
CachalotThe Cachalot, or Sperm Whale must surface periodically, but prefers to hunt in the deeps and will venture through the gate to the Elemental Plane of Water for larger prey.
Colossal Octopus Ever hungry, Colossal Octopi will attack for food but will beat a hasty retreat if their prey are well able to defend themselves.
Colossal Squid Ever hungry, Colossal Squid will attack for food but will beat a hasty retreat if their prey are well able to defend themselves.
Con Rit The Con Rit occasionally emerges from its hidey hole at Rlyeh, to hunt for food. The gate has been an excellent locale for dining.
Deep One (5e Race)These characters are of the 5e Race described in the D&D Wiki, and are detailed below. They may be on a pilgrimage, guarding the approaches to the gate, seeking treasure, etc.
Deep One Priest of Dagon The Priest of Dagon is an emissary from one of the temples in Rlyeh. He may be in or near the gate to welcome pilgrims, or see them off, or to observe and report passage of interlopers.
Dragon Turtle Intelligent and capable, the Dragon Turtle is in the area watchful for those seeking the gate to the Elemental Plane of Water. It will take advantage for food or profit.
Elder Thing Elder Things are either watching the gate, or are in the area to take advantage of interlopers seeking access to the Elemental Plane of Water. Parley is possible, but they will attack a party displaying a symbol of Cthulhu. They may employ spies to venture to Rlyeh.
Eurypterid Ever hungry, Eurypterid will attack for food, and once engaged will fight to the death.
Eye of the Deep Eyes of the Deep occasionally stalk prey near or in the gate.
Giant Octopus Ever hungry, Giant Octopi will attack for food but will beat a hasty retreat if their prey are well able to defend themselves.
Great Water Elemental Great Water Elementals guard the gate in service to more powerful creatures in Rlyeh. They will attack any intelligent creatures which fail to present a symbol of Cthulhu.
Hammerclaw CrabThe Hammerclaw Crab occasionally emerges from its hidey hole at Rlyeh, to hunt for food. The gate has been an excellent locale for dining.
Kraken When the Kraken is about, most other creatures lay low or find reasons to be elsewhere. Its fell purposes are unknown to others except possibly some Elemental deities.
KrakentuaThe Krakentua controls a vast swath of Rlyeh, and is in telepathic communion with the dead Great Old Ones. It has many slaves and worshippers there. It occasionally travels through the gate for purposes unknown.
Laernean Hydra The Laernean Hydra must have a source of oxygen at its lair in Rlyeh, as it returns there after brief excursions. It periodically prowls near the gate, seeking food, treasure, and the prestige of winning battles with other fierce sea creatures.
Merfolk HunterMerfolk are either watching the gate, or are in the area to take advantage of interlopers seeking access to the Elemental Plane of Water. Parley is possible, but they will attack a party displaying a symbol of Cthulhu.
Merfolk StormbrewerMerfolk are either watching the gate, or are in the area to take advantage of interlopers seeking access to the Elemental Plane of Water. Parley is possible, but they will attack a party displaying a symbol of Cthulhu.
Pearl Titan The Pearl Titans of Rlyeh are lawful evil and each controls land, slaves and vassals, and a cyclopean mansion there. They are not necessarily allied with the servants of Cthulhu or even other Pearl Titans, and each may find reason to deal with outsiders.
Sea Hag Sea Hags frequent the area due to the presence of the gate and the variety of life forms it draws. They kill out of spite and in hopes of personal gain.
Sea Serpent Sea Serpents may be drawn to the area due to the presence of large prey using the gate. They will attack anything resembling food.
Sea SlimeSea Slimes take advantage of slime and seaweed in the water to surprise their prey, be it a ship or a creature.
Silver GiantSilver Giants in the area are Chaotic Neutral and not aligned with any particular faction in Rlyeh. They can be negotiated with, especially if valuable tomes or special secrets are offered. They may even serve as guides in Rlyeh.
Sinii KraiSinii Krai love to hunt for fish in and around the gate. Wherever they are, they don't care for invasions of their privacy or space, and will attack if provoked in any way…
Tentacle DevilTentacle Devils guard the gate area in service to more powerful creatures in Rlyeh. They will attack any intelligent creatures which fail to present a symbol of Cthulhu.
Water ElementalWater Elementals guard the gate in service to more powerful creatures in Rlyeh. They will attack any intelligent creatures which fail to present a symbol of Cthulhu.
Young Green DragonThe Young Green Dragon periodically comes up from Rlyeh to hunt, increase its treasure stash, or generally cause trouble. It has allies in Rlyeh to guard its hoard while it is away.
Young Orange DragonThe Young Orange Dragon is a narcissistic bully, and will attempt to intimidate a party using bluster and insults. His goal is to profit from any encounter, not necessarily to fight or kill. He loves to be worshipped or flattered.
roll twiceA mixed party of trouble... Avoid duplicates (roll one die again to achieve a different result). The resulting creatures or parties will be allies, or at least sharing a common goal, one possibly in the service or thrall of the other.


Deep Ones (5e Race):

A party of 3 Deep Ones includes the equivalent of a Knight, a Priest, and a Thug. In addition to the capabilities identified for these NPC types, they share the following attributes: Speed 35 ft., swim 45 ft.; Senses: darkvision 60 ft.; Amphibious; Languages: common, aquan, and deep speech. Attacks as described for the NPC type or for the Deep One race.

Further, each has these individual attributes shown below. A party of 5 Deep Ones includes two additional Thugs.

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Knight Priest Thug Thug #2 (party of 5 only) Thug #3 (party of 5 only)
Alignment: Neutral Lawful Evil Neutral Evil Neutral Chaotic Evil
Proficiencies:Stealth, PerceptionSurvival, NatureStealth, PerceptionAthletics, PerceptionStealth, Intimidation
Cantrips: minor illusionlight, sacred flame, thaumaturgy, guidanceray of frost resistance shocking grasp
Magic Items:+1 Greatsword; +6 to hit, 11 slashing damage+1 Chain Shirt, AC 14+1 Mace; +5 to hit, 6 bludgeoning damage+1 Leather Armor, AC 12+1 Trident; +5 to hit, 6 piercing damage
Wealth: 20gp10gp, 2x10gp gems5 gp, 1x10gp ring6 gp2 gp, 1x8gp ring
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