Aurea's body was engulfed in Sacrilege Flame and she was in extreme pain, but luckily she had lost her sanity, unbothered by it. Her body was sizzling as the flame tried to devour her skin, but her regeneration ability was unmatched even for the flame. The Sacrilege Flame wasn't as strong as Mykel's which was why she survived and endured the flame.
The dragon roared, releasing a beam of corrupted divine power right into Aurea's face. While it was trying to burn her to ashes, a sword slit its throat, a small cut was enough to make it stop releasing the beam. But the cut was immediately healed as it had amazing regeneration as well.
"We know the dragon and Ciel shared the same pain. If one of them died, the other would die as well. The question is, how are we going to kill that thing," Rozan pointed out after he observed both the dragon and Luciel.