Kalkydri

The twelve-winged kalkydri are an exceptionally violent kind of demon and the fastest flyers anywhere in the planes. Like winged demons they can teleport or travel between dimensions, twice a day in their case, but they are rarely used to carry messages; they are far better suited to murder and kidnapping. Their tremendous speed means they always strike first in any fight and usually catch their prey unawares. Their razor claws slice through any leather armor, and their bite carries a venom that paralyzes the victim for 5-20 minutes unless it saves vs CON. They can also see invisible beings.

Like the empusa, a summoned kalkydri demands a living human and will take nothing else; the only other way to win its service is by force. Once a pact is made it can be ordered either to kill any one creature or to grant a limited wish. Unlike winged demons, a kalkydri will fight if sent to abduct someone, though it will not let itself be killed for the task. Common greater demons slain away from their home plane may be reborn as kalkydri.