Yeah the puzzle thing should’ve been explained better in wait for it....
[spoiler]a story[/spoiler]
English
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Just wait. Next season we'll get to hear that Shin is close to finding us but it'll be just offscreen and in a passing bit of dialogue that we hear anything about him or the drifter. Ooh, collect more lore for the story? Don't mind if I don't cause this is complete horse shit.