You know the story of the Pokey Little Puppy, right? How the one little puppy to be slower than the others always got into trouble? That sounds familiar. What happens when you fall behind in siege when being chased by the enemy?
Not too much more information for it, but there’s now video footage of the dungeon and I realize that it seems to be a revived version of Dark Poeta with harder enemies (scaled up to high daeva levels, of course).
You fight Tahabata where you fought Anuhart in Dark Poeta, and you fight Kuroban where you fought Tahabata.