Melf's Acid Arrow
Wizard
A shimmering green arrow streaks toward a target within range and bursts in a spray of acid. Make a ranged spell attack against the target. On a hit, the target takes 4d4 acid damage immediately and 2d4 acid damage at the end of its next turn. On a miss, the arrow splashes the target with acid for half as much of the initial damage and no damage at the end of its next turn.
At Higher Levels: The damage (both initial and later) increases by 1d4 for each slot level above 2nd.