Doug's Death Coil

Fire a blast of unholy energy at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 necrotic damage plus your intelligence modifier. If you target an undead creature under your control, it gains 1d6 plus your intelligence modifier temporary health instead.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st. The creatures must be within 30 feet of each other when you target them.

h/t to the original creator of Death Coil