Cruor

You clot the blood of a creature within range. For the duration of the spell, that creature takes 1d8 necrotic damage whenever it moves more than 15 feet on a turn.

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 targets must be within 30 feet of each other when you target them.