Yes there is a scene with mabel, it's in dlc 3.
Old king is the "last boss" in that once you beat it, you get the info dump but there are a lot of bosses in there like cinderella, wyvern, god in lake, sleeping god, goat, onimusha, sleeping beauty. The dungeon goes as deep as depth 19 with infinite layers. Some of the rarer items like the ultimate spells are only on the deeper depths.
Space time dungeon is the chaos dungeon except your level is reset to level 1, you have start with 100? in each stat, and you have some starter gear. There's no unique reward for this mode. it's garbage
Old king is the "last boss" in that once you beat it, you get the info dump but there are a lot of bosses in there like cinderella, wyvern, god in lake, sleeping god, goat, onimusha, sleeping beauty. The dungeon goes as deep as depth 19 with infinite layers. Some of the rarer items like the ultimate spells are only on the deeper depths.
Space time dungeon is the chaos dungeon except your level is reset to level 1, you have start with 100? in each stat, and you have some starter gear. There's no unique reward for this mode. it's garbage