Sap Life

4th-level necromancy
Casting time: 1 action
Range: Touch
Target: A creature in touch range
Components: V S
Duration: Concentration, up to 1 minute
Classes: Druid, Wizard, Necromancy
Subclasses: --

You touch a creature within range and begin to drain the life out of them, feeding on it to regain your own health and strength. The target must make a Constitution saving throw.

It takes 3d10 necrotic damage on a failed save, or half as much damage on a successful one and you regain hit points equal to half the amount of necrotic damage dealth.