Holy Bone of Ruunen

• 
  Deimpo Mausoleum

  Nearest Crystal Monument: Lower Area
  In an area past your progress. Tap to reveal.

Tip: set your progress to keep locations in later areas blurred.

A fragment of bone said to be from the skeletal remains of Ruunen, avatar of Puwema. While it's certainly quite old, verifying its authenticity is an impossible task.