Investigating Tavaly's Mystery

Walkthrough

1. Speak to Quinn in Tavaly, kill ten of each Sacred Forest 1-1 creature, collect one Fragmented Plan, and report.
2. Kill twenty-five of each and collect ten more Plans, report, wait three hours, and collect Sacred Treaty.
3. Equip Aman Hostile Costume and Headgear, say “Hostile Emissary” to Theodora in Town Hall, then say it to the commander at Sacred Forest 6-1 (5,2) for Ritual Part 1.
4. Say “Sacred Ritual” to Theodora and gather 5 each Blue, Red, and Grey Frog Meat, 10 Dendron Flowers, and 20 Aqua Stones.
5. Return to the commander, then say “Hostile Emissary” to the Great Guardian at Sacred Forest 12-1 (35,9).
6. Give Theodora 20 Blue Vines, 20 Yellow Vines, 20 Crystal Bars, and 20 Grey Furs; meet the Great Warrior at Sacred Forest 19-1 (38,52) and follow his ruins instruction.
7. Return to Town Hall, say “Secret Ritual”, assemble the requested team, and meet at the cave.
8. The published reference ends at this quest gate; no corroborated final cave encounter or reward hand-in is described.