High Priest's Lightsworn Seeker

This mount is rewarded from the priest-specific quest The Sunken Vault (follow-up to the quest The Speaker Awaits); this quest chain becomes available at the Broken Shore (Deliverance Point) once you have completed Breaching the Tomb (and Broken Isles Pathfinder Part 2).

It's a cool-looking mount with the head of an owl and the body of a four-legged beast; when you use it to fly, it also has large, angelic wings which emit glittering specs. The saddle includes a pair of wings at the back which also emit a radiant (or shadowy) glow.

The skin/colors of the mount change when you change specs (images posted here):

Holy - golden
Disc - white
Shadow - purple

I was about to be very upset thinking I had a defective mount. I couldn't get it to fly straight to save my life. It would either keep going up and keep going down. Then I saw the message pop up in yellow "You feel sober again.". I forgot I drank some Rumsey Rum Black Label . I had to apologize to my little seeker.

The mount sounds really cute. It occasionally chirp-meows, like what a bird would sound like if it meowed like a cat. Adorable.