Originally posted by jorpoulp:

Oh man the plains are quite dangerous, going from the elder and its biome gears to yag without getting oneshot every 5 mins is i think just impossible. You can try.

I'm assuming OP has already cleared Bonemass and Moder and is geared appropriately.

Anyway the pointers seem to be based on the runes, not on progression so it's probably just a matter of not finding the right one yet in the plains. I've actually never seen the loacting rune, have only found the boss location randomly (hard to miss, ring of enormous stones that look a bit like skeletal fingers, with an altar in the center.)