Made in Abyss

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

Riddle
''South of Skandeia Bay, from the goddess's light I ran. Past the den of teeth and bones, past poor sacrificial lambs. Across the sea on a lonely isle where ships reluctantly rest in peace, I nestled deep in a dark chamber and bade goodnight to Greece.''

Outcome
Kassandra found and recovered the treasure.

Reference

 * Assassin's Creed: Odyssey