Darkbolt

Harnessing the grim power of death, you fire a black, crackling stroke of necrotic energy at a creature you can see within range. A living target takes 6d10 necrotic damage and cannot recover hit points for 1d4 rounds. If the creature makes a successful Constitution saving throw it takes half damage and can recover hit points. Constructs and inanimate objects are unaffected.

If you target an undead creature, it instead recovers 6d10 hit points and resists radiant damage for one minute. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage or healing increases by 1d10 per spell level above 4th.

 Adapted from the Player's Guide to Faerûn (3e).