An Ancient Curse

Aiji the Accursed rare is located in Sunken Path / Xal'vor Nazmir on Zandalar isle.

You will see [object=287081] with An Ancient Curse quest near the rare location.
Take it and it will spawn 5 altars in the Xal'vor ruins.
You need to activate all 5 to summon the Aiji the Accursed.
They are located in ruined buildings in Xal'vor ruins.
Face rare from quest pick up side and you can find glyph:

1. 
   
2. Right in front of the rare.
3. 
   
4. Near the closest ruined house to the left
5. 
   
6. To the right of the rare position, inside a house with walls
7. 
   
8. To the right and a little bit behind (north east)
9. 
   
10. To the right same as before but a little bit further behind in house down the stairs
11. 
    

For TomTom users
/way Nazmir 52.99 72.06 Aiji the Accursed (rare location)
/way Nazmir 52.92 75.96 An Ancient Curse (quest location)

/way Nazmir 52.48 73.87 Brazier 1
/way Nazmir 51.72 71.83 Brazier 2
/way Nazmir 54.06 72.10 Brazier 3
/way Nazmir 54.41 70.79 Brazier 4
/way Nazmir 54.54 69.26 Brazier 5

Video: https://www.youtube.com/watch?v=knwMqIuyFQw

Initially activated glyph was visible like a splash of blood on the ground.

This quest is required for Shoak to sell you the Accursed Hexxer pet.

Apparently, the quest was slightly altered, cause the previous comments mention GLYPHS you have to walk over. Nowadays it's BRAZIERS you have to "touch" with your cursor that turns into a hand when mousing over it. You can only interact with them, until they're lit. So if you see a blueish swirly flame arising from a brazier, then it has already been activated by someone else. Nothing left to do here. Move along!

Once all 5(!) braziers were activated by whoever and have that blueish swirly thingy appearance, the rare will show up in the stone circle and you can kill it.