As the Master of the Mirror World, Angel could now throw an Archangel like the "Abomination" Suah into another space without having to enter it herself.
This was similar to the banishment of a "Justiciar" and the Authority of Secrecy of "Darkness," but with a slightly different emphasis. Once inside the Mirror World, Suah would find that although he could move freely, he was confined to a space the same size as this Cursed Land and could not use it to escape.
Angel's aim was to separate the two Abominations briefly and deal first with the "Chained God" Tolzna, who possessed the Uniqueness of the Bound and was more powerful, but had difficulty moving.
This King of Angel was the core that anchored this hidden Cursed Land, as well as the means by which the "Mother Tree of Desire" transmitted power through the barrier. Even if the heinous Suah escaped, Tolzna could not be allowed any chance to flee.
Moreover, Angel suspected that this "Chained God," who could only descend through Suah's prayers each time, was exactly as his name suggested: his true body was bound here, unable to move. Otherwise, the instant she had used the coordinates to find this place, the two "Abominations" should have fled together through the Spirit World rather than waiting for Suah to drive his followers to perform a ritual and relocate.
Judging from their last battle in Vertec City, the "Chained God" seemed to retain some independent consciousness. He had displayed a dispirited attitude during the battle and had even consciously sought to end his own life to escape this existence worse than death. But most of the time, his body was beyond his control and in the grasp of the "Mother Tree of Desire," so he had been unable to fulfill that