You snap your fingers during a battle (or after). All participants (dead and alive) return to full health .

This spell closes all wounds, neutralizes any poison, cures all diseases, and lifts any curses affecting the participant when it was injured or died during the fight/battle. The spell replaces damaged or missing organs and limbs. All terrain returns to normal and all items lost in the fight recovered. Participants return to their location before battle and all dice rolls reset (initiative e.g), all spells reset and anything that occured at the start or during the battle resets.

This spell can only be casted by one person per one battle (2 Clerics cannot cast the spell each e.g). If the caster uses this spell again in another fight/battle and does not have full hit points, the spell works. However the caster becomes unstable (-1 Hit Points) 

Upon completion, the caster takes 5 levels of Exhaustion

This spell cannot fail, be interrupted or stopped.