Yuri_G
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You can actually find the Tear of Ash even with just one obelisk. You just need good spatial awareness. I found the area with the Tear, estimated where the center was, and dug it up on the third try.
Bravo! Have you tried looking for it without opening any obelisks at all? :)
I'm curious how you would manage to find the Tear with one obelisk and the camera slightly rotated?