Since it was impossible to infer the origin of The Master of Liu Village, Emperor Cang decided to test the man's mettle using a group of Immortal Kings from the Alien Territory; he only needed to hold his position in the rear, cooperating with several other Dark Quasi-Celestial Emperors to break open the Immortal Domain's Boundary Wall.
The rest was to observe every move within the Immortal Domain.
However, relying solely on the Immortal Kings from the Alien Territory might not necessarily provoke The Master of Liu Village into action.
After all, the Immortal Domain is one of the rare main domains in the world, born even before them, not to mention it's an Alien Territory created by their very hands, incomparable to the Immortal Domain.
Under such vast spans of time, naturally, its depth of heritage can't be matched by other realms.