Dark Corner was just such a "landed" Wonderland Instance. As long as certain prerequisites were met, it could descend at any time.
According to the retrieved information, the activation condition—or rather, prerequisite—for Dark Corner was—
Find a way to enter Dark Corner within Modern City.
At the same time, once the Dark Corner Instance was activated, Dream Crystal Plain would not display an instance entrance, nor would there be any crystal creations manifested outside the instance.
To enter the "Dark Corner" Instance, one could only first enter Modern City.
And enter Dark Corner through Modern City.
It could be understood as Dark Corner being an instance within an instance.
Not only was the instance entrance located in Modern City, but some of Dark Corner's quests were also inextricably tied to Modern City. If a raider was unfamiliar with Modern City, it would be virtually impossible to gain anything in Dark Corner.
Dark Corner and Modern City were linked ring after ring, their connection immensely deep.
Seeing this, Angel finally understood why, when he had used God's-eye view in Modern City before, he had been unable to locate Dark Corner no matter how hard he searched.
Because...
Dark Corner was currently a hidden instance. Only after fulfilling its activation conditions and letting the instance "land" could one possibly see what lay within.
As for the method of activating Dark Corner, Angel guessed it was most likely related to the quest "The Missing Knight."
Of course, Modern City was so vast that there should be other quests pointing toward the method of activating Dark Corner.
But one thing was certain: "The Missing Knight" was absolutely one of them.
Angel then thought of Sisley's second-stage quest: "The Clown's Heart Knot."
The completion objectives for this quest were as follows:
``` "Find a way