All the time limited mounts have names suggesting they won't be permanent... Like
disobedient or
unstable in the name. New players that made Priden, got zone limited wolf (doesn't work outside Howlem). There was a 1 hour wolf called Disobedient Wolf with Twilight skin that disappeared after an hour of riding (time didn't run unless you were mounted). The Novograd/Nezebgrad courier mount (horse) only lasts for few hours (irrelevant since you had wolves). Don't recall other time limited wolves. But I don't know what new bonuses a brand new player might get so there might have been a new time limited mount.
Here's my
Allods fan site where I try collecting info. Started to put info about mounts couple months ago but been lazy with photoshopping pictures. Straight link to the
Mounts.