Caustic Touch

our hand sweats profusely and becomes 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.
This spell’s damage increases by 1d8 when you reach 5th
level (2d8), 11th level (3d8), and 17th level (4d8).