Homebrew
Blood Boil
2-level Necromancy
Casting Time: 1 action
Range/Area: Self (20ft sphere)
Components: Verbal, Somantic
Materials: 2 Runes
Duration: Instantaneous
Creatures of your choice in range must make a Constitution save or take 3d8 necrotic damage and can't be healed until your next turn. Half on success.
At higher levels: you may expend additional runes to increase the damage by 1d8 for every additional Rune expended
Available for: Death Knight