Hey guys,
I’m pretty new to wow, post BFA. I know about glyphs for different travel forms and stuff but I have no idea about different guardian forms but I’ve seen them. So I’ve done some googling and it has to do with the Artifacts from Legion.
But how does that work post BFA, and how do I go about getting them?
This isn’t the right forum, this is for Classic.
As for how to get them, other than the Mage Tower artifact skins, you should still be able to get them by doing Legion content for your Artifact. Go to your class hall and you should be able to pick the quest up.
oh sorry must have misclicked something.
No worries, a mod moved it to General Discussion for Retail, so you’re in the right place now. 
First make sure you have Legion dalaran unlocked then unlock your class order hall. There you can go on a quest to get your Artifact weapon per spec. After unlocking the weapon you can view the different forms you can unlock and how to unlock them. Most of the ones that require more effort are extended into BFA. These are ones like complete 200 world quests, kill 1,000 players, or reach certain honor levels in PVP. Also each artifact weapon has a hidden appearance you will have to look up (if you want it). And the mage tower appearances are no longer available in game.
Keep in mind that you can no longer get the Legion artifact appearance for the Mage Tower challenge Bear form.