How Glaistig's power works

I want to fly, she thought.  A shadow lurking within her responded, and it lifted her up.

The crystal jolted into motion, going from zero to two hundred miles an hour in an instant.  She only barely intercepted it, her fingers grazing the surface, bending painfully and burning at the brush with the light.

But she made contact with something.  She held onto that something with her power.

He flew away, and a part of him stayed behind.  He made it a few hundred feet before the power quit on him.

Ward, Gleaming, Interlude 9