glitched gates

There's a 4th gate to a tiny room southeast of the center. You have to clear it before the next gate opens.

Actually that's wrong. That's only there in Fomor Attack and The Other Alchemists. We're talking about Ghost of Partholon.

ANYWAY after you offer all the enemies, there's a big fat room to the southwestern most area. But honestly there's no way you couldn't have ignored that since that's where the path was leading to.

It wasn't just me running it I had 4 others with me and we used an elite pass. There is no way we would have missed something like that. We run Gop elite all the time and this is the only time its happened to us.

Oh. Well, considering I haven't played mabi in so long, I'm surprised I even remember what a Shadow Mission is.