Two of Clubs

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

Riddle
''There is a club not far from here that rivals this iron beauty. Travel southeast to the edge of the Valley of Dreams. I will be waiting atop the bigger of these two clubs.''

Outcome
Kassandra found and recovered the treasure.

Reference

 * Assassin's Creed: Odyssey