If you're lucky enough to have a Zandalari Troll Paladin, it should just be in your mounts section of collections.
This one's a beauty, always wanted a paladin on my horde side, since my taurens are druid/shammy and Belves are Wlocks and DH, and I don't do more than 2-3 of the same race on same server, at least when we had the character-limit per-realm locks.
Invoque un navrecorne de croisé, qui vous sert de monture.