C137 Kill the Holy Envoy of Yin and Yang

The discovery of the Imperial Seal made the Mighty Sky Sect uneasy.

The Imperial Seal was the first of all palm imprint martial skills, and belonged to the Saint Ranked Supreme martial skill, and the Phoenix King's Seal of Mighty Sky Sect was one of the two most powerful martial skill in the world.

However, the Imperial Seal was able to restrain the Phoenix King Seal