I'm serious, no enemy or boss in this game has pissed me off as much as Mephistopheles. But what really angers me is when you fight him the second time with Asura.
For starters, if he kills Momo, that's it. You can't re-summon him by using a Prayer Crystal, because of a stupid oversight on the devs' part where any boss battle that gives you a partner to fight with disables the ability to summon any other partner, youkai, or mount.
INCLUDING THE PARTNER YOU HAVE IN THE BATTLE.
How does Momo die? Because the devs decided that Meph needed THREE ATTACKS that instantly kill you, one of them being the lightning he uses at ground level, which stuns you even as Asura, and when you change back, it stuns/kills you and then kills Momo.
There's also the fact that almost every other attack he uses POISONS YOU, and whittles your health down so fast you don't have time to react and heal using a Mega Potion or Hi Potion.
That's not even mentioning the glitches I've seen in that battle, as shown below.
So yeah, I'm stuck on the quest Divine Possession - Guardian of Justice , all because the devs just COULDN'T restrain themselves when programming Mephistopheles. I'm not even sure if I can get help because I don't know if other players can even enter the same dungeon I'm stuck on.
Remove Mephistopheles' instant kill attacks, remove the poison element to all but ONE of his attacks, and fix the damn issue with being unable to re-summon Momo when he's defeated!