Spiral Charge

Spiral Charge is a technique that is only taught to Knights of Skyloft. It allows your Loftwing to attack in the air. Link eventually learns this technique after he seals The Imprisoned for the second time.

To learn the technique after you have done so,you must head back to Skyloft using a Bird Statue which were scattered all over the surface by the Goddess long ago.Then head to the Knights Academy and speak to Headmaster Gaepora (who looks astonishingly like Rauru from Ocarina of Time) who will be in his office at the Knight Academy,which is located at the top of the stairs.

He will tell you to speak to Instructor Owlan,who's room is next to the Headmaster's.(Convienient)

Owlan will tell you that a creature called Levias,has not been his usual happy self and that you must learn the Spiral Attack/Charge to calm him down (a.k.a Kick his butt until he is happy again)

He then challenges you after learning to move,to check if you have mastered it.

You use this move to rid Levias of the parasite Bilocyte and gain knowledge of the Song of The Hero