So with today’s official introduction of the Freeblood vampire race to EverQuest 2 as the first Premium race, the remaining secrets have been unveiled. Chief among them is that the Swarm of Bats premium mount/ability available exclusively to Freebloods will, when Destiny of Velious expansion launches and a quest has been completed, be usable as a full-fledged Flying Mount. From the official announcement:

Characters who go on to unlock flying mounts in the Destiny of Velious expansion will also be able to use this ability to fly.