If they only had the strength shown on the surface, how could they possibly seal an eight-star level Space Gate?
Since Ye Xing and the others hadn't engaged in battle, Ye Yi couldn't accurately judge their strength either. Judging martial artists is somewhat easier because the use of Spiritual Power varies with the level of strength.
However, it's much harder to determine the strength of a Demon Spirit Master.
After all, the quantity and magnitude of Soul Skills are hard to assess. While some judgment can be made from the power of Soul Skills, it's not absolute.
Some Demon Spirit Masters might even possess two Demon Spirits, making judging solely by the number of Soul Skills prone to error, as some Martial Skills resemble Soul Skills in effect.
And in a battle, how could someone possibly release all of their Soul Skills?
Even if they did release them all, some Soul Skills might still be hard for observers to notice.
Just like Lin Feng.
