The skies of Zion are glorious, shining heavens to be traversed by righteous Angels. However, those who fly through the land of Zion must take care to remain in flight, lest they plummet to some impossibly distant land below.
Empty Sky may be crossed with normal flight abilities. It can be crossed with Feet of the Wind, but unlike Void it cannot be crossed with Ether Stepping. The sacred skies of Elysium cannot be bent to serve demonic powers.