With the portal to the eternal kingdom sealed, Asna's core couldn't absorb celestial energy even if it wanted, leaving Felix without an ounce of energy to study.
The only thing left was this bizarre ever-burning black flames and he knew that copying its effects would help him in the long run.
So, he spent months and months studying the black flames until he could reproduce a decent copy...Alas, he wasn't too satisfied with the results.
"Is my lack of understanding of the celestial energy the reason?" He thought out loud as he stared at the burning Lucifer whose screams engulfed the entire consciousness space.
"If you had brought back some of that celestial energy, I could have run some experiments on it and figured it out." Lady Sphinx shared.
She was quite fascinated by the celestial black flames after hearing that they could burn forever without needing any connection with the owner.