The Soul of Flight is one of the 6 Souls that monsters can drop after the Wall of Flesh has been defeated in the world. The Soul of Flight is only used for crafting Wings and the Hoverboard , which are advanced movement accessories. The only way to obtain Souls of Flight is by killing the Wyvern and Arch Wyvern(console) mini-boss.
All Souls are found in hardmode after you have beaten the WoF (Wall of Flesh) one time.
Like all other Souls, the Soul of Flight ignores gravity.
The quantity of souls dropped varies from 5 to 13.
Soul of Flight is the only Soul-item that does not pulsate when dropped.