Dragon amulet arc is the focal dish of this whole arc.
Dungeon arc not even close since it's a side dish. Predictable as it is, characters from the dragon arc comes home, the swimming pool is prepared for everyone to relax. Simple ending as that.

The dungeon arc. Simple, you guys can do what you see fit with filled interaction and adventure. 

Don't rush the work of art. I apologize for confusing everyone with the latest post I made. I hope I am able to solve it.