Arcana's Hotfix

A spell created by one of the more enigmatic wizards of Ebaria, it combines the power of elements and hemomancy to ensure that the person you wish to aid would last until the end of a fight, no matter in what condition they would be afterwards.

With a touch, you cauterise the wounds of a willing creature, making them restore health points in an amount equal to third of their hp maximum. Immediately afterwards, the creature's maximum hp gets lowered to the current amount of their hp and restores to their original amount after they finish a short or long rest. If the target of this spell's maximum hp cannot be reduced, the spell fails, without expending the spell slot used to cast it.