Temporal Recovery

You create a temporal bond with a willing creature within range, warping time and space around them so that they may use the potential of what could have been in that moment . When you cast the spell and at the beginning of the targets turn they may spend a number of their hit die, up to your intelligence modifier, and heal the amount rolled plus the level of the spell. When the spells end, you and the target gain one level of exhaustion for 1 hour. 

This spell ends early if you lose concentration or move beyond the spells range at anytime during its duration. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you may target an additional creature in range. For each creature targeted this way, you take an additional level of exhaustion beyond the first when the spell ends.