The Origins of Spyrite
When to do it: After being able to travel between Elympios and Rieze Maxia
Reward for Completion: None
How to Trigger: Enter inside the fortress to trigger a cutscene (refer to the screenshot above).
Objective: Watch the cutscene
The Devil Beast Attacks
When to do it: After being able to travel between Elympios and Rieze Maxia
Reward for Completion: Melandetta, the Deathbringer (weapon)
How to Trigger: Go to the place where you fought Volt. You will find the beast lurking on the thirteenth floor. (refer to the screenshot above).
Objective: Defeat the boss