Where can I buy a WoW Token?

Excuse me, I'm a bit new to this whole cryptocurrency and gaming token thing, but I've heard a lot about WoW Tokens and I'm interested in getting one. Could you please tell me where I can go to buy a WoW Token? Is it something I can purchase directly from the game's official store, or do I need to look for it on a cryptocurrency exchange? I'd really appreciate any guidance you can offer on this matter. Thank you!