All the Undead sensed the problem—could the Great Rift be a late-game map in the game?
Not only did the Undead think so, Lind also believed it.
The fact that all Epic Level Catastrophe Executioners were corrupted indicated that the enemy was at least of Epic Level or higher. Boyd couldn't say for sure what power the Rock King possessed; he had been cursed merely by being glanced at.
Unquestionably powerful, stronger than Lind.
Combined with the "Official's" untrustworthy pre-update, Lind's thoughts were reaffirmed—The Officials had a very weak control over this world and something unforeseen had occurred, prompting them to rush into open beta testing.
And the "unforeseen circumstance" must be related to the Abyssal invasion from the Great Rift—impenetrable, hence the need for the Undead to fill the gap.