OK so i was going trough some YouTube videos about WoW and found a nice video on how to get in the Show-Arena under Dalaran I will post the link to the video so that you can watch it. And I'm sorry that i cant make a pic guide its because my server is still on 3.0.9 and i don't play on retail. (Dont have that much money )

[How to] Get in the Show-Arena under Dalaran [VIDEO]

Credits ofc go to the guy who made the video and discovered the glitch.