Blood Bolt

You use your blood to create a vampiric arcane dart. Make a ranged spell attack against a creature you can see within range. On a hit, the target takes 1d4 necrotic damage. You gain temporary hit points equal to half of the damage dealt at the start of your next turn.

This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).