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if that is Powder, my theory is that it's because Ekko and Heimerdinger left behind their notes and stuff ( I think ) so she was able to crack how the crystals work. Also because she was there when they figured out the time rune, and probably knows what that looks like.
If she is there at the bridge scene in the arcane universe we know, she might have figured out how to use them to hop between universes :0
okay but this is powder from the good timeline at the bridge scene. i don't understand what it means. pls someone explain ðŸ˜