I read the topic for the transmog on these. You need to get them both on the DH and then kill illidan on time walking so u can tmog them. But do they become account wide then? Or only the character that has them both AND kills illidan on TW can mog them.
In short, I dropped one on my DH but i kinda need em on my DK. Will my DK be able to Mog it if i get the achivement on the DH?
Please shed some light for me, that official topic is a bit confusing
The ones you drop from normal Black Temple, yes, they are swords but they are not available for transmog. Once you have them you need to run Timewalking Black Temple on your DH and you will get Warglaives of Azzinoth that are classified as Warglaive weapon type and will unlock the transmog.
It was before they made Legendaries available for transmog in general so it is convoluted to get that transmog.