When Azief was in his Soul Form he understands a bit about soul attributes and then as his thoughts returned to him he was reminded of Meihul and Azul Six Reincarnation Wheel.
That Wheel that control rebirth and reincarnation and the countless souls that is inside that Wheel, and could imprison anyone even an immortal being that could not be destroyed.
How could he forget it?
He then uses the opportunity to divinate and create a new type of illusion when he is in Soul Form.
In such condition, the body that is usually the limiting factor was removed. He put all of his energy into his mind as his mind seems to deconstruct the concept of Karma, Rebirth, Reincarnation, Life and Death in the Wheel.
When he is thinking of illusion his mind would surely go to Hikigaya.
Hikigaya put illusion in his eyes but he also could activate his illusion as long as one looks at any part of his appearance.
