The following section of our Devil May Cry 5 Guide, contains a description of the eighth secret mission in the game.
Secret Mission 08
Where to find it: Mission 11 - Demon King
To reach this secret mission, go to the big building - you'll see it quite early during the mission. Above the entrance to the building, you will find a platform - jump on it, and you will discover the Secret Mission 08.
This time, you have 50 seconds to get a score of style S. Thus, you have to fight with your enemies, avoid getting hit and perform long and fancy combos. The task is not very difficult, provided you use the Trickster and mainly rely on dodging. It is useful to also perform taunts mid-air, which can effectively raise the current rank. As a reward, you will get a fragment of the blue sphere.