False Wyrm

Can you solve the siren's riddle? They name me serpent of the sky, though scale nor flame belong to I. No ember sleeps beneath my breath, yet from above I carry death. No coil I cast, no cavern keep, yet in the heights my throne runs deep. Where thinner air denies the weak, I carve my path where few may seek. My gaze will find what none can see, from leagues away beneath of me. A silent judge with sight so keen, I mark the world that lies between. My shadow falls before my will, a fleeting sign, then all is still. No roar, no cry to warn the ground just sudden end without a sound. They speak of dragons crowned in flame, of gilded hoards and ancient name yet I hold none, and still I reign, unchallenged lord of sky and plain. No scale, no fire, no crawling frame yet feared alike, though not the same.