Caustic Touch

Your Spectral Mage Hands start to sweat profusely and become coated in a film of caustic slime. Make a melee spell attack against a creature you touch. On a hit, the target takes 1d8 acid damage. If the target was concentrating on a spell, it has disadvantage on its Constitution saving throw to maintain concentration.

Cantrip Upgrade. The damage increases by 1d10 when you reach levels 5 (2d10), 11 (3d10), and 17 (4d10).