Just delete your account, your constant negativity is gratingIt's actually pretty shitty storytelling to needlessly withhold crucial information from the audience for no reason. This was originally supposed to air as one episode with a week gap before the "explanation."
If Sabine is an expert in deciphering magic maps, that's not something you hold in your back pocket for no damn reason, particularly when the entire story hinges on it. "Ooh, scary bad guy might come back! This seemingly random, unrelated thing will tell us how....eventually!" The audience shouldn't be so far behind the characters.
Even in serialized storytelling, a single episode should still be able to function.
It's not my fault that they don't know how to write properly.