Umbral Touch

Channeling Umbral Magic, make a ranged spell attack against a target within reach. On a hit, the target takes 1d8 Necrotic damage, and it can’t regain Hit Points until the end of your next turn.

Cantrip Upgrade. The damage increases by 1d8 when you reach levels 5 (2d8), 11 (3d8), and 17 (4d8).