The Underdark of Ishtoc

The underdark is a large, expansive cave system.

It is nearly completely flooded, with large underground oceans filled with glowing coral. These patches of coral are used for healing, alchemy and much more.

The underdark also contains massive ore deposits, such as the valuable ore mythril.

At the center of Ishtoc is the largest open cavern in the underdark. Multiple other cave systems branch off from it. The capital city of the drow is located here.

Drow in this world are a group of good, charitable people, with a dark past of slavery. They once were a massive slaver empire on the surface, but after an uprising they were forced underground, and have changed their ways. This cruel stereotype still lives on above.

Mindflayers:

Mindflayers and duergar are an allied force of pirates that plague the floating Drow cities. They also use krakens, and aboleths as strike forces. They sculpt vessels out of flesh to use. At the center of these vehicles is the elder brain. The elder brain serves as the leader of the group of mindflayers.

Duergar:

Duergar are a group of dwarves that live in the underdark. They craft and sell weapons to anyone that buys. They also use animals to do harsh manual labor. They live in large cities, carved from stone. Duergar are also capable of holding their breath for over 45 minutes.

Beholders:

Beholders ally themselves with the drow and fight against the mindflayers. They also run major corporations in the drow kingdoms and have massive influence over the government. Beholders living outside of the drow kingdoms carve massive cave homes.

Deep gnomes:

Deep gnomes are traveling merchants, selling their steampunk technology. They also fly above the waters of the underdark on massive mechanical bats. They are incredibly powerful but prefer to live humble lives.

Ettercaps:

Ettercaps work as construction workers and architects in the drow cities. Drow cities are made from buildings stacked on top of each other, with large bridges and pathways made by webs connecting each other.

Chwinga:

Chwinga are small fey beings, they hide in rocks and live in the nooks and crannies of the world. They have a natural interest in other forms of life. They are known to watch and learn from others. If a Chwinga takes an interest in someone, they will reveal themselves to you. They grant blessings to others. These blessings are extremely powerful. These blessing come with specific rules. If you fail to abide by these rules, then the gift is retracted and you are cursed. Most Chwinga dwell in the underdark. However some live above.

Aboleths:

Aboleths are large serpentine creatures with multiple other tentacles branching off from their central bodies. They have 8 eyes.

Aboleths steal knowledge from those they capture.

They are also capable of psychic magic.

They once lived in the oceans above but were driven underground by the tritons.

Gloomstalkers:

The gloomstalkers are a group within the rangers. They are skilled in the dark. Most people are fearful of the underdark and its residents, so it is mostly unexplored. However, the gloomstalkers have penetrated nearly all of the depths, and their expeditions and their findings are confidential ranger information. They have also mapped all but the deepest cave system.