Battle vs. God, Dragon Quest VII's Boss of the 1st Bonus Dungeon.
I swear God was going easy on me, I remember him being a whole lot harder than this. I don't have HealUsAll
or MegaMagic and according to some guides I've read I'm about 20 levels under what they recommend. I defeated him in 12 turns, which I don't think is all that bad of a job for my current strengths.