Mounts

[Iwhoopurass]

Hi.

 

First of all sorry if it's the wrong section to ask, a moderator/admin please move if it's the wrong one.

 

So I just joined yesterday, I had very little time to discover (I continue today however I still can't figure out this little problem) so I wanna ask where I can get mounts as Horde character? I found the trainer and some exotic mount in Orgrimmar but I seen people ride on the Lich King's horse (Invincible) and other rare mounts, but can't find the vendor. Can anyone please share that information with me?

 

Do I need to run through ICC to get Invincible or I can simply buy from shop? And where I can find that shop?

 

Thanks in advance.