Here are two playable lineages I put together for an all-subterranean campaign I hoped to get off the ground, using Sly Flourish's Ruins of the Grendelroot. We ended up going with a Ghosts of Saltmarsh campaign, instead
Some Pointless Geographic Context
Above the flinty peaks of Kazbeg howl endless storms and demon winds. Below, dwarves thrive, secure in their halls of stone.
Kazbeg is a region within the dwarven nation of Scarmis. To the south is Middlemarch, the home of humans. Further south lies elven Nantierre. North of Scarmis, across the frigid waters, is Nord, which bears the North Pole, one of the pillars that holds the sky aloft. These nations are part of Ecumene, a collection of continents on an infinite flat plane of land and ocean called the Glorious Mundi.
The campaign, called Under the Kazbeg Mountains, would have featured a lot of dwarves, kobolds, svirfneblin, and other playable lineages that like it underground. To this I added some dungeon weirdoes of my own: bat guys and animate candles.
Also, in the world of Ecumene, each species was given its own language by the gods, except for humans. A long-forgotten slight against the gods ended in the removal of their birth-tongue, forcing humans to craft nation-tongues.
A species little-known outside the Kazbeg Mountains, Natbakka rarely venture from the caves and warrens of Scarmis’
Underworld. They are lanky humanoids with the features of cave bats. Wing-like membranes called patagia connect their arms
|I was not able to track down the source of this image. Apologies!
Ability Score Increase. Choose one: (a) Increase one ability score by +2, and increase a different one by +1; (b) Increase three different ability scores
Languages. You can speak, read, and write Khuzdul, the Common of the Kazbeg Mountains, and Eetititl, the birth-tongue of the Natbakka.
Size. You are Medium or Small. You choose the size when you select this race.
Speed. Your walking speed is 30 feet. You have a climbing speed equal to your walking speed.
Echolocation. You have 20’ radius blindsight. You can't use echolocation while deafened.
Gliding. You can glide twice the distance of your starting elevation at a rate equal to your walking speed. You can't use this trait if
you're wearing medium or heavy armor.
Keen Hearing. You have advantage on Wisdom (Perception) checks that rely on hearing.
Will o' Wicks
The dwarves of old crafted diminutive candle-golems to aid their work, discarding them when the work was done. Some of
these golems learned to preserve their flames, and gathered in the deep recesses of the mountains to form little, glittering
communities. In time, the gods recognized them as their own lineage, giving them a birth-tongue and the ability to reproduce.
Ability Score Increase. Choose one: (a) Increase one ability score by +2; (b) Increase two different ability scores by +1.
Languages. You can speak, read, and write Khuzdul, the Common of the Kazbeg Mountains, and Votilabra, the birth-tongue of will o’ wicks.
Speed. Your base walking speed is 30 feet.
Living Construct. You are classified as a construct and do not need to eat, drink, or sleep. You do not need to breathe, but if your flame is deprived
of air it may go out. You do not sleep and instead enter an “smolder” mode where you are inactive but fully aware of your
surroundings. You only need 4 hours in this state to receive the benefits of a long rest.
Life’s Flame. If your flame is doused, either by water or smothering, become incapacitated until it is relit. The GM may allow a Constitution
saving throw to keep your flame smoldering and remain active.
Radiance. Your flame sheds bright light in a 10-foot radius and dim light for an additional 10 feet. You can dim this light when necessary.
Candleburst. As an action, you can project your flame at a creature within 10 feet of you. Make a ranged attack. On a hit, the target takes
1d8 fire damage. This damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).
Waxy. You have advantage on rolls to escape being grappled or restrained.