Earlier, when she had begun to transform, he had an uneasy feeling which was why he had tried to stop her for the first time. But then her dark-green mana stuck to his knuckles and he tried burning it off.
When his normal mana flames that were potent enough to burn even peak Five Star and even quasi-King materials failed to instantly burn it, he became curious and scanned it with his bloodline sense.
The result?
He found the aura of it vaguely familiar. Upon thinking for a bit, he realized he had exuded similar, and on a deeper, intrinsic level, the same aura when he was possessed by the devil energy.
'She is using the Devil Energy to power up?' The thought arose in his mind, but he knew it wasn't entirely true because while Isolde seemed to be getting more and more angry and losing composure, he could tell she was still sane and showed no struggle of battling dark, corrupted thoughts induced by the devil energy.
