One of the long-term requests you'll be working on over the course of Pokemon Legends: Arceus is Eerie Apparitions in the Night. This will have you trawling all over Hisui in search of glowing purple Wisps - 107 of them to be exact.
There are 20 of these collectibles in each open-world area of the game, which includes Obsidian Fieldlands, the first area you go to. An important hint is that you'll be able to see them from afar if it's nighttime, otherwise they'll only show up when you're very close. Talk to the Galaxy Member at any camp to rest until nighttime if you need to.
Also, some Wisps will only be available once you have certain Ride Pokemon, so it may be best to wait until you have all five of them before working on this quest in earnest.
All Wisps In Obsidian Fieldlands
This Wisp is found on Ramanas Island and will require Basculegion to reach.
You can find this Wisp just to the southwest of the marker for Sandgem Flats as seen on the map.
This Wisp is found right at the bottom of the map, in the center where the land meets the sea.
Head north from the map marker for Tidewater Den to find this Wisp.
Head directly south from the map marker for Aspiration Hill to find this Wisp on a hill surrounded by water. You may need Sneasler to get this Wisp.
This Wisp is a little out of the way but easily accessible, just head to the northeast part of Horseshoe Plains.
Use Sneasler to climb the cliffs on the northeast corner of the map for this Wisp.
This Wisp can be found next to the eastern river, just north of Obsidian Falls on the map.
Head east from the Heights Camp to find this Wisp.
This Wisp can be found on the eastern edge of the map, near the map marker for Oreburrow Tunnel. Be careful, as there may be some tough Alpha Pokemon hanging around here.
Head to the left when crossing the bridge towards Grandtree Arena and you'll come across this Wisp on a hill.
Just to the west of Grandtree Arena you'll find this Wisp in a high location.
There are some steep hills in the area between Floaro Gardens and Aspiration Hill. Use Sneasler to climb up them to find this Wisp.
Head to Lake Verity and search the northeastern shore to find this Wisp.
There's a small island situated between Sandgem Flats, Windswept Run, and Ramanas Island. This is where you'll find one of the Wisps you need.
Explore the southern edge of the map to find this Wisp. You might need Wyrdeer's jump or Sneasler's climbing skill to get up the steep hills.
This Wisp is on an outcropping directly overlooking the Heights camp.
You can find this Wisp quite easily by keeping an eye out near Deertrack Path, it's on top of a hill.
This Wisp is found by heading to Worn Bridge. You'll find it directly to the left of it on the side of the bridge closest to the Heights Camp. It's next to the river itself, beneath the bridge.
You can find this Wisp easily by heading west from the Heights Camp and sliding down some cliff faces.
