Sebastian Crowe's Guide to Drakkenheim, renamed and adjusted
4-level Necromancy
You infect a creature you can see within range with a magically enhanced parasite which infects creatures blood. Once per turn when a creature hits the infected target with a weapon attack, that attack deals an additional 4d6 necrotic damage, and the attacker regains hit points equal to half of the necrotic damage dealt. Each time the infected target takes this necrotic damage, it makes a Constitution saving throw against the spell. If the saving throw succeeds, the spell ends.
AN: Renamed from Blood worm, changed theme a bit to include blood. Also nerfed the heal to only half. - Might rework it to not include the healing at all. Kinda doesn't feel thematic.
When you cast this spell using a spell slot of 5th level or higher, the necrotic damage increases by 1d6 for each slot level above 4th.
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