Sample Race: The Pamoni

The Pamoni are the first race I randomly created using this system. They are a mountain-adapted race with parasitic origins and a predilection for crafting. They would fit into the classic world as a race similar to, but in opposition of, Dwarves. As they are crafters, we'll choose to make their alignment tend towards Law. However, since they dislike Dwarves, and they are parasitic, we'll also make them tend towards evil. As most evil races tend to have short lifespans, we'll also give them a below average lifespan - 60 years, and make them mature quickly. For languages, they know Common and one other language, which could be their own, Undercommon, or perhaps Dwarvish. I chose to go with Undercommon, implying that they used to be from the Underdark but were forced upwards for some reason. This makes them have the following traits:

Ability Score Increase. Your Dexterity, Constitution, and Intelligence scores increase by 1.

Age. Pamoni mature much faster than humans, and have shorter lifespans. They reach adulthood by the age of 8, and tend to live to about 60.

Alignment. The Pamoni's parasitic nature makes them tend towards evil, and their civilized society of crafters makes them tend towards law.

Size. The Pamoni's origins in the Underdark mean that they have adapted to food being scarce, and are thus smaller than most races. Pamoni tend to stand at about 3-4 feet tall, and are of Small size.

Speed. Your base walking speed is 25 feet.

Darkvision. You have Darkvision out to 60 ft.

Disease Resilience. Pamoni are used to drinking the blood of other creatures, and have adapted to resist most diseases. You have advantage on saving throws against disease.

Life Drain. Pamoni have a special mouth like that of a lamprey, allowing them to latch on to a creature and drink its blood. As an action on your turn, you can drain a living and unconscious or willing creature, dealing necrotic damage to them equal to 1d6 + your level that cannot be prevented in any way. If you do, you gain temporary hit points equal to the amount of damage dealt for 1 hour. Once you use this ability, you cannot use it again until you finish a short rest.

Cold Adaptation. Pamoni are naturally adapted to the cold of the mountains and Underdark. You are naturally acclimated to cold climates and have resistance to cold damage.

Artisan. Pamoni have a similar crafting predilection as Dwarves. Most Pamoni have proficiency in Smith's tools, to work with ores found in the mountain, but you can choose any set of artisan's tools to have proficiency with if you think they fit your character better.

Languages. You can speak, read, and write Common and Undercommon. Undercommon is the language of creatures in the Underdark, and sounds guttural and echoing to most creatures.