You're going to be spending a lot of time making friends with these farming spots for Operator and Weapon Upgrade Materials in Arknights Endfield. Every operator and their skills (as well as their weapon) in Endfield need to be leveled up with a combination of basic materials and the ones unique to them. These basic materials are always needed in abundance, but what you find by exploring the world and through questing will, of course, never be enough. Here is where you can go and stock up on specific items for building and branching out your favorite teams.
