This exploit takes place in the south of Zandalar, on the coasts of Xibala.
You'll need to own the toy
Ai-Li's Skymirror from
Mist of Pandaria to achieve it.
This toy is pretty easy to get, so don't be scared by the idea of having to farm it.
Go on this zandalari boat; it takes less than a minute to reach it from the Dark iron camp.
There you'll meet the Third Telemancer Syranel, one the rare disciples of Oculeth.
She's a nice person, she even teleports the Dock master out in order to avoid civilian casualties.
But what's really interesting is her unique ability "Vertical Displacement".
Most people will simply avoid it and stay unaware of its effect.
But we'll actually need to stay on it for this exploit.
Contrary to what the text suggests, you're not actually getting teleported into the air :
In fact this is more like Suramars elevators where you're turned into a big arcane ball flying upward.
This is when you should use the skymirror on yourself. Don't wait for too long or you'll return to your original appearance.
If you succeed, you'll now be nearly invisible for 10 minutes and people will only see your weapons!
In order to prolongate the effect, you have no other way than getting
Reflective prisms and someone to group.
Plus, take into consideration that every visual effects caused by spells or weapons will remain visible.
There are many other ways to turn invisible but I don't plan on revealing them yet.