Archdevan Formula

[Enchanting Material] Used for upgrading accessories.

[Usage]
Daylight Accessories
Frostmetal Belt
Superior Brooches

[Source]
Dark Reach Citadel
Ruinous Manor
Velik's Sanctuary
Antaroth's Abyss
Ghillieglade
Island of Dawn
Corsairs' Stronghold
Fraywind Canyon
Champions' Skyring
Guardian Legion credits
Level 65–67 monsters in hunting zones

Darumag's Loot Box Enchanting Crate. Brilliant Enchanting Chest Champion's Enchanting Chest Guild Supplies Guardian Legion Reward Box III Champion's Enchanting Chest II Gridiron Reward Chest +5