A  Zhentarim flying snake is fiendish copy of a flying snake, a brightly colored, winged serpent found in remote jungles. Tribespeople and cultists sometimes domesticate flying snakes to serve as messengers that deliver scrolls wrapped in their coils.

It is used by certain Zhentarim spies as a tattoo that can be summoned once per long rest for 10 minutes as a familiar or can be used as the animal messenger spell but with a speed of 150 miles / day. When summoned the tattoo becomes black instead of colorful. When killed the tattoo reappears on the owner and can't be used until after the next long rest.