blood Arrow

A shimmering dark crimson arrow streaks toward a target within range and bursts in a spray of blood. Make a ranged spell attack against the target. On a hit, the target takes 4d4 necrotic damage immediately and can't heal on its turn. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d4 for each slot level above 2nd.