Okay so I'd want to be either an amphiptere, or- what I would most simply describe as... a faceless zombie crystal dragon with an extra set of legs instead of wings.
Geometric iridescent crystal bones, six 'ribs' that instead of connecting with eachother, each jut out and end in a spike, a cracked crystal orb core in the center of the ribcage, porcelain white skin, crystal bone spikes jutting out in various places like joints and spine, a long whip-lile tail that ends in three spikes pointing like a Y. Smooth head, no eyes or nose, but a gaping fanged maw, with several probisci and a set of mandibles kinda like praying mantis arms. Can stand bipedal, quadrupedal, or hexapedal as needed. Sleek and flexible, but not lacking in power; almost feline in build. And six horns that fan out and back from the head.