Spatial Rift Crack

Spatial rift crack was a terminology for an unexpected portal that could be linked to someplace else. One could say that it was the unauthorized and unsupervised version of a Teleport Platform.

However, the big difference between the two was that the Teleport Platform was constructed by experienced people whereas spatial rift crack was a natural occurrence. 

To put the cherry on the topping, the coordinates where one would end up after stepping foot in it could be changed.

In other words, if Melvin had come to Willowbrook Village through Point A, and tried to step back to the spatial rift crack, he could wind up in Point D, E, F, etc. 

"Ah, so it was you." Now that Melvin had a clearer look at Xu Feng, he realized his identity. "So you didn't fall for Otis' trick but rather used it against me to trace me back here." 

"I'm afraid you're mistaken." Amused, Xu Feng shook his head.