William Nightraven has a unique physiology naturally adapted to flying that includes a pair of huge bird-like wings, hollow airfilled bones which decreases his weight far below usual, and a greater proportionate muscle mass than ordinary. His eyes can withstand high-speed winds and enable him to see in absolute darkness, and his respiratory system has a special membrane that enables him to extract oxygen from the air even at high velocities or altitudes.
Joseph Running Wolf is a lycanthrope and can alter his physical form to that of a werewolf. In this transformed state he is able to take on the characteristic traits of a wolf, including its heightended senses and stamina as well as strength and speed far beyond those of normals wolves or men. Although he is influenced by some wolfen instinct when transformed, he keeps his human mind and gains razorsharp claws and fangs.