Vitality Trade

This Dunamantic spell allows you to switch a willing character's physical well being with their future well being. Record the character's current health, spell slots, exhaustion levels, and other expended abilities. He/she/they immediately are restored to his/her/their maximum hit points and all spell slots (including any spell slot expended on this spell) and abilities are restored. Additionally, any current exhaustion levels are removed.

The DM will make a secret roll of 2d4 representing number of long rests.  On the start of this long rest, the character will use his/her/their recorded information instead of gaining the benefits of a long rest. Any exhaustion levels gained will be added to the current total.

If the character dies before  this exchange is complete (but not because of), the vitality will be considered to have been inadvertently traded from the character's soul and all resurrection spells will fail. Only a Wish spell will be able to restore the character.

The exchange must be competed before this spell can be cast again. 

Higher Levels: When you cast this spell using a spell slot of 6th level or higher, you can target one additional willing creature for each slot level above 5th.