When you're hungry and the boss does the Big Bang attack it actually heals you.
Boss has a trick.If you have the Hunger debuff the Megidolaon Burger heals you instead of dealing damage. You shouldn't have any ally that can heal debuffs automatically though.
What in the fuck.
I only got healed once and didn't know why.
Game of the forever.
Also, I can now send the calling card to the 6th palace, but I will do Daily stuff now first and explore Mementos.