C617 A Supreme Existence

The appearance of the stone door had something to do with the Six Realms of Reincarnation Pupil Technique he had used. However, he had used the Pupil Technique quite a number of times to fight his enemies. Why was it that the stone door had only appeared twice? The rest of the time, he didn't see any abnormalities.

There must be something in this!

However, he had to slowly recall this matter