Draining Touch

As part of casting the spell, target a creature and make a touch spell attack. On a success, you inflict 2d8 necrotic damage to the target and you heal hit points equal to the same amount of damage just dealt. The healed hit points cannot take your current hit point total above your hit point maximum.

At the start of each of your subsequent turns, for the duration of the spell, if you maintain contact with the target, you can automatically inflict an additional 2d8 necrotic damage to the target, healing yourself for an equal amount of hit points equal to the damage inflicted each turn.

The spell ends if you lose contact with the target, if you lose concentration or if the spell ends.