Stone Cold

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

Riddle
''Travel southwest of Korinth in the Valley of Judgment to find a beautiful monster. You can find me on the tip of her tongue. Just be careful not to get swallowed by her gaze.''

Outcome
Kassandra found and recovered the treasure.

Reference

 * Assassin's Creed: Odyssey