Leagion Artefact Weapons

[Timae]

Can someone tell me how to unlock all the Legion Artifact weapons?
 

I accepted the quest in Dalaran but can only select 2 models in the transmog. So how do I get everyone unlocked?

 

[123AZKR]

i guess you must be buy another from the shop, idk i have travel around the game but every each transmog set i look for cant drop. 

[rafaelantunez]

you can mage tower one, and other depends on the class