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Basic information
- Stack limit
- 1
How to obtain
Progress the Lightning Stone objective in the Underground Ruins. Inspect the rusted golem, have Koo follow the scent, and collect 10 stones while tracking the thieving golems.
Key itemsCurated
Lightning Stone
雷の石
A square stone imbued with electricity, sometimes found in ancient ruins. Legends say it once helped us reach the stars.
Updated Aug 8, 2026