Star Wars New Saga

You siphon life energy from a target, weakening them physically and mentally while enhancing your own vitality. The target must make a Constitution saving throw. On a failed save, they take 4d8 necrotic damage and you regain hit points equal to half the damage dealt. On a successful save, they take half damage and you regain no hit points. If the target is reduced to 0 hit points by this spell, their life force is consumed, leaving them lifeless. You can also choose to drain Force energy from a target, rendering them unable to cast spells until the end of their next turn.