Rightful King

Rightful King was a virtual representation of one of Kassandra's genetic memories, relived by Layla Hassan through the portable Animus HR-8.5.

Riddle
''You have come so far, your training is nearly complete. With shining strength in hand, you will seek victory. Take the path north up Mount Taygetos and you will find me at its snowy summit, where stone turns weak.'

Outcome
Kassandra found and recovered the treasure.

Reference

 * Assassin's Creed: Odyssey