acidic bite

Acid drips from your jaws as you attempt to bite down upon a creature. Make a melee spell attack against the target. You have advantage on the attack roll if the target is unarmored. On a hit, the target takes 1d8 acid damage, and it can't take reactions until the start of its next turn.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).