Draining Touch

Dark energy comes to your fingertips to drain the life energy from a creature you touch. Make a melee spell attack against the target. On a hit the target takes 1d8 necrotic damage and you gain temporary hit points equal to the half the damage dealt, rounded up, for 1 minute. This spell has no effect on undead or constructs.

At higher levels. The damage increases by (1d8) when you reach 5th level, (2d8) when you reach 11th level, (3d8) when you reach 17th level.