When Shang had trained in his smaller Isolation Chamber, he had also tried out his connection to his Abominations.
Of course, in Shang's panicked state, he would have destroyed the Isolation Chamber by summoning Abominations if he actually could.
Inside the Isolation Chamber, it was still impossible to summon Abominations.
However, Shang noticed that he still had his connection to the Abominations as long as the chamber wasn't completely closed.
Shang entered the Isolation Chamber and focused on the Magic Circle controlling it.
He could close it whenever he wanted, but if he wanted to open it, he would need to activate the timer. After all, since no Mana could escape from the inside, Shang couldn't possibly communicate with the Magic Circle on the outside.
Shang stopped in the middle of the Isolation Chamber.
