"Let's refine these souls first," Sterl said without hesitation after the battle ended and the danger was averted.
He had witnessed clearly how Will of Hell had controlled the souls of those Hellish creatures to detach them from the Mother Body. What if Will of Hell noticed the soul puppets within his Purgatory Space and decided to snatch them away?
Although these souls had lost all will and pliability, becoming mere puppets with no chance of regaining independence, Sterl wasn't entirely confident. After all, his Stellar Barrier—the absolute defensive force—had been shattered by that strange gray mist. Given that, he couldn't be entirely sure about anything.
To avoid any future issues, it was better to refine them now.
By transforming them into soul power and storing them in the Soul Devourer Sphere, he felt it would be the safest option.
