Fragment Guide | Ortlinde's Bloom (#52)
Yachas Massif (110AF) - Find proof of terrorist action sidequest
You'll receive this quest from the red orb at the uppermost excavation area of the ruins, though it will only become available after completing the Waltraute's Flower & Gerhilde's Blossom sidequests.
After receiving the quest, go to the area with the searchlights. Beside the largest pit in this area is a hidden item box. Use the Moogle Hunt ability to reveal it and pick up the Terrorist's Mark.
Return the mark to the red orb, who will reward you with Fragment of Time #52 - Ortlinde's Bloom