Update
I have created trial human warrior. Done basic training, respec to prot, next HS to stormwind, portal to azshuna, closest flight master to highmountain peak, went to cave and it worked on the second attempt (i mean on the second trial char). I was lucky because my plan was to create few chars and just log on daily and check.
Afterwards i had to do on that trial char quest to get artificat wrapon to make it possibile to be transmorg on my main warr and that’s all. I had read valor saga on my main only, trials had only prot spec nothing else. Saying that i cannot beloive how stupid idea was to create such way to obtain this apperance…
Hope it will help someone either maybe.