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
Route Layout
The Old Airship Route runs along an elevated stretch of broken sky-lane, with the Holy Feather Altar magic source roughly halfway along the path. The route can be entered from the Kaluoxi'a Continent main loop after the relevant magic source has been activated for fast travel. Wild spirit density along the path skews toward Wing and Earth types.
The altar is a tall stone monument with a flat platform in front of it; the throw target is the monument itself.
Both hidden-spirit triggers spawn within walking distance of the altar, so neither requires a long walk to find.
Several daily exploration objectives also pass through this zone, making it a natural stop on a daily routine.
Two-Throw Strategy
The altar accepts repeat throws. Throwing a Ground-type spawns Stone Stone, and a Water-type throw spawns Caterpillar. Carrying one of each before fast-traveling in is the safest way to clear both hidden encounters on the first visit. The altar trigger does not consume the thrown spirit.
After Both Captures
Once both hidden spirits are caught, the altar is functionally a scenic landmark. The fast-travel teleport remains available, and the route still hosts respawning wild encounters, so it stays useful for Magic Level and Ranks experience grinds during the early-mid game.