Death Coil

A beam of necrotic energy streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 necrotic damage. This spell deals an additional 1d4 necrotic damage if the target has any temporary hit points.

This spell's damage increases by one die when you reach 5th level (2d8 or 2d4), 11th level (3d8 or 3d4), and 17th level (4d8 or 4d4).