Shackles of Pain

4th-level abjuration

Casting Time: 1 action
Range: 60 feet
Components: V, S, M (a pair of manacles)
Duration: Concentration, up to 1 minute
Class: Bard, Cleric, Paladin, Warlock

You link the vitality of a willing creature within range—the source—to the psyche of another creature within range—the target. The target must succeed on a Charisma saving throw or become linked to the source for 1 minute. Each time the source takes damage, the target takes psychic damage equal to half the damage the source took. If you yourself are the source, the creature takes this damage immediately before you make a Constitution saving throw to maintain your concentration. Whenever the target takes damage in this way, it can repeat the saving throw, ending the effect on a success.

Source: Heliana's Guide to Monster Hunting