Anon's Boundless physique had a Dark Soul, God's Eye, and Boundless Body.
When he previously exchanged secrets with Maarsha, his Dark soul devoured wisps of her energy, whereas his God's Eye deciphered the most fundamental structure of her soul.
His Boundless Body mimicked her soul and energy signatures, and he assumed her identity.
On the other hand, his ungodly nature had nurtured a little devil in Maarsha's heart.
Just as he could return from death through the heart of someone he influenced, he forcefully manifested through Maarsha's heart, altering her existence by mimicking Elshen's body and soul structure.
Maarsha's identity as Elshen was completed after sacrificing his Region Dominating Blades and the Banner of Void Spirits.
Because Maarsha was never going to survive this confrontation, he knowingly abandoned these treasures to sell the act.
