Indeed, the purpose of Stylla for the Full Deck BoneTender, had been to use her to get acquainted with Aigas so that he could easily find the source of what made it a Rich World. Enthralling her with his ability served to ensure that Stylla wouldn't resist and would accompany the Null Devil King on his quest.
Of course, a few minutes ago, the Null Devil King had been led to believe that he had found what he was looking for, only to discover that he had been tricked and that it was all a ruse.
The thought of this filled the BoneTender with rage, but he wasn't done yet.
He had panicked when he realized that Stylla had been smitten unconscious.
Other than scouring Edagon inch by inch, she was his only ticket to find the true worth of Aigas.
Sause, Yuyui, Benzard, Aurolio…
All these others wouldn't work.