Anyone know exactly what magatama to dissolve for Fox Charm?

If you want fox charms, I would do Banjiro Island Hard difficulty with the biggest filler party you can find. Almost all of the maga from there should be able to dissolve into fox charms.

Edit: I have also heard that Ravaging Wolf Magatamas from Lacus Mortis can dissolve into Fox Charms. That may be your best bet. Milky Quartz/Rutile Quartz/Staurolite/Fossilized Magatama from doing Warabizuka Hard can also dissolve into Fox Charms.

Thank you. just hard to pass? or can be Hell difficulty?