Cataclysm Private Server of Firestorm. The realm of their Cata server is called Deathwing. It’s running on 5X XP rate, and is a PvP realm.
Shop: They offer Gear, Levels, Gold, Mounts, Characters. (Cashgrab/Pay-2-win).
The Cataclysm Realm from Firestorm (Deathwing) is very low-populated, with usually 0-20 players online. At the time the author wrote this, the server has only 2 players online. We do not recommend Firestorm, if you want to play Cataclysm. There are better options for Cataclysm, than Firestorm.
The reason why, is simply because the Cataclysm realm, is a full pay-2-win/cashgrab shop, very average scripting, and a very low population.
If you however want to try, you can get started on their website, here: