Ren had Strength, but he lacked Speed. The Spirits (Fey) in the forest mocked him. They flew on the wind, raining arrows down on him.
"Iron is useless if it cannot catch the leaf," Ren realized.
He traveled to the Canyon of Gales. He hunted the invisible Wind Elementals. You cannot cut wind. You cannot punch wind. You must inhale it.
Ren stood on the cliff edge. He opened his mouth and swallowed a hurricane. The wind tore his lungs. It tried to burst out of his chest.
Ren clamped his mouth shut. He forced the wind down into his legs. CRACK. His leg bones shattered. They reformed instantly, becoming hollow and light, like the bones of a bird.
He took a step. WHOOSH. He vanished. He appeared behind the Fey archers before the sound of his step reached them.
He slaughtered them. But when he tried to shout victory, no sound came out. The wind in his throat had stolen his voice. He could only whistle like a gale.
Ren had become a silent, iron storm.