Previously, Ling Han had not managed to recall it, because those people from the Ancient Realm were too weak, and there was no possible comparison between the two.
It was only now that he felt some kind of strange change taking place in those two statues by the doors, transmitting an amazing power to the person inside the arena, and only then did realization dawn on him.
Clearly, everyone in the ancient castle was more covert when they borrowed power, or rather more proficient, and Ling Han was unable to sense it right until that newbie made an attempt just now, which finally allowed Ling Han to capture some traces of it.
This was a completely new system of cultivation, but was also a system of cultivation that Xiao Gu despised to the extreme. Ling Han did not know the people here, but he knew Xiao Gu, so he was naturally on Xiao Gu's side.
Furthermore, the methods of Xiao Jun and his party practically could not be more evident.