Chillsby's Shivering Shackles

Shackles of elemental energy restrict the target for the duration, dealing 1d4 cold damage as they wrap around their arms and legs. The target must make a Con save or become restrained. While restricted, the target has disadvantage on the next Dexterity or Strength Saving throw until the end of the spell's duration.

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 ft of each other