Enter a battle and take a substantial amount of damage. Then, find a spot to teleport and regenerate your HP and MP it has to be one where Noctis basically hangs there with his sword. Execute a companion technique while you are regenerating your HP and MP (Prompto's Stinger works well). When the short QTE for the follow-up strike occurs, execute it. You have to not have fully regenerated your HP and MP by this point for the exploit to work. HP and MP regeneration will now keep happening until you end the game or load a save. Note: This glitch was performed on an unpatched version of the game. It will probably eventually get patched. To avoid not being able to use this exploit, either do not install new patches before using this exploit or delete the patches. You can avoid patches being installed by disconnecting from the internet until you are ready for the game to install new patches.