Empire of Storms (Throne of Glass, #5)

by Sarah J. Maas

As if she were blowing out a candle, Aelin exhaled a breath toward the man. First the commander went quiet. As if every thought, every feeling had halted. Then his body seemed to stiffen, like he’d been turned to stone. And for a heartbeat, Aedion thought the man had been turned to stone as his skin, his Adarlanian uniform, turned varying shades of gray. But as the sea breeze brushed past, and the man simply fell apart into nothing but ashes, Aedion realized with no small amount of shock what she had done.

They both turned, giving Rowan Whitethorn horrifyingly innocent smiles. The Fae Prince, to his credit, only winced after they looked away again.