The key to defeating the Depravita Race was the Ancient Key. However, Cain still needed to formulate and put into motion a plan to achieve that goal. After all, as of right now, Cain had no idea in which part of Atlas the Lovecraft City was hidden.
"The Lovecraft City is definitely hidden inside the Dark Fog, and most likely, it is the phenomenon's origin. However, while the inside of the dimension could match a continent, it is very small from the outside. Even my [Multidimensional Scan Force Field], whose scanning power surpasses a Third Realm Ego Wave, can only perceive it once it is close." An annoyed expression appeared on Cain's face as it became clear that taking the Ancient Key would not be easy.