Where Can I Find Nii Runes?

Hello, So I reached level 75, and now I want to try some corrupted dungeons, but the problem is that I can't find any places with Nii Guardians. Can anyone tell me some places to get Nii Runes?

Thanks

 

Nii Guardians normally spawn anywhere from the Light/Kander forest area to the Canyon of the Lost, and there are some cords they spawn more often around
-1004, -4763 In the light forest near the forgery
-583, -5358 The south side of Lexdale
367, -4897 At the hobgoblin farm next to the Air Temple
725, -5337 Near Thesead and Eltom

If you can't find any or don't want to grind for them you can always buy runes off the trade market

 

try light & kander