Overview
Old Airship Route (旧飞艇航道) is an exploration zone on the Kaluoxi'a Continent built around the ruins of an ancient airship lane. It hosts the Holy Feather Altar magic source (圣羽祭台魔力之源), a statue point that spawns two hidden rare spirits based on which spirit type the player throws.
Holy Feather Altar Statue
Stone Stone (石石): Throw a ground-type spirit at the statue. Stone Stone spawns in the surrounding area.
Caterpillar (小草虫): Throw a water-type spirit at the same statue. Caterpillar spawns nearby.
Tips
Carry both a ground-type and a water-type spirit on your first visit so you do not have to return to town between the two triggers.
Both spawns are one-time pickups. Miss them and the reset is not guaranteed outside of future event reruns.
See Also
Stone Stone - profile
Caterpillar - profile
Hidden Secrets and Collectibles - full hidden spirit list
World Map and Locations - continent map