Ten thousand Godforce Crystals are equivalent to one hundred million units of Divine Power, and Lin Xiao has not yet accumulated enough. Even the Divinity he possesses is insufficient, meaning he currently can't split off an Incarnation of God. He'll have to wait a while longer to gather enough Divine Power and amass some more Divinity before doing so.
Lin Xiao's return to the Fifth War Zone Fortress was a True-Body Descend, as he temporarily could not condense an incarnation and had to personally come in his true form.
Before coming here, he had first returned to the school, mainly to register that he had achieved Divine Enthronement. From now on, he would not have to attend the various routine major classes.
