The gacha aspect of Arknights Endfield is impossible to escape; the vast majority of playable characters can only be obtained through it. And though you can count on max potential of all 4★ and even 5★ units fairly shortly into your adventure, it's the 6★ units (and their own potential) that will truly stand out and make a difference on the battlefield. Let's take a look at the basic principles behind Endfield banner rules and who and when to expect to run, or rerun in the future.
