The Meal Rank provides a bunch of benefits for your party, and you can unlock it by completing a certain subquest.
Unique weapons are some of the most powerful weapons in The DioField Chronicle, but you have to unlock them in the shop first.
The Horace Threat is a quest in The DioField Chronicle where you have to fight the Gigas at the end to complete.
Unlocking Areas on Rainbow Island gives you resource farming locations as well as additional Slimes for your Collection.
