Postulant's Respite

8th-level abjuration
Casting time: 1 action
Range: Self
Target: An ally and yourself within 10 feet
Components: V, S, M (a pinch of powered silver)
Duration: 24 hours
Classes: Monk, Cleric, Paladin
Subclasses: --

In a true act of selflessness, you cast an unbreakable link between yourself and an ally within 10 feet, permanently linking their welfare with yours.

Until the spell ends, you may use your bonus action to give this ally the benefit of a long rest at the cost of you receiving 1d4 levels of Exhaustion.