Location
In Mission 16: Diverging Point: Dante, after the second forced battle, drop down instead of going to the way forward. There will then be another forced battle, after this one, drop down on the highest platform in view then on the one to its left, turn the camera and a Red Orb Crystal should be in the distance, jump towards that area by either doing a double jump and a Sky Star (Trickster), or a Stinger and a Sky Star, or a triple jump while Devil Trigger is active.
The area after the Red Orb Crystal has more small platforms to get to - jump to the highest one in front, then turn the camera around and on the right side is a bigger area to get to which is a small dead end, jump to it and the glowing point will appear at that dead end, turn the camera around and up slightly and you will see the pattern.
The next platform just below the location of the Secret Mission has another Red Orb Crystal, which is a good indication to know where it is. If you've fallen to this area, you can still get back up by doing a triple jump with Devil Trigger active.
Walkthrough
A total of 800 Red Orbs need to be acquired in order to finish this Secret Mission, simply equip the Dr. Faust and use the Set Hat skill. If fully upgraded, it will take about four throws of the hat to get 800 Red Orbs or less if the player follows up with a Hat Trick.
If the Empusa is killed and 800 Red Orbs were not acquired, or the timer runs out, the mission will be failed.
Gallery
