Tor'Dath is publicly available D&D campaign setting currently licensed under Creative Commons Internation 4.0 (until a lawyer comes along and tells me I have to change it). The goal is a fully functional D&D Campaign setting for D&D 5th Edition that is 100% free for reuse.
It is written by Joshua Lee for his D&D Campaigns you can follow the bulk of the writing progress here on Kanka. It's still under active development and feel free to help contribute. ...
You create a ghostly, skeletal hand in the space of a creature within
range. Make a ranged spell attack against the creature to assail it
with the chill of the grave. On a hit, the target takes 1d8 necrotic
damage, and it can't regain hit points until the start of your next
turn. Until then, the hand clings to the target.
If you hit an undead target, it also has disadvantage on attack rolls against you until the end of your next turn.
This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).