2 Nephi 28:18

But behold, that great and abominable church, the whore of all the earth, must tumble to the earth; and great must be the fall thereof:

But that great and terrible church, the evil church of all the earth, must fall to the ground. Its fall will be great.

That great and corrupt church—the prostitute of all the earth—will come crashing down. Its fall will be devastating.