Bonds of Pain

A crackling cord of negative energy tethers you and a creature you can see within range. 

The creature must make a Constitution saving throw or be tethered to you for the duration. When you take damage while a creature is tethered to you, it takes necrotic damage equal to half of the damage you suffer (rounded down).

The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

The spell ends if the target is ever outside of the spell’s range or if it has total cover from you. Additionally this spell has no effect on undead or constructs.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, you can target one additional creature for each slot level above 6th. The creatures must be within 30 feet of each other when you target them.