Genshin Impact: Seiraimaru Walkthrough Puzzles and All, Seirai Island, Inazuma
The intact key is in the chest at 2:32.
Rush- Worn Key is in the first chest when you follow the Seelie.
There are 3 Relay Stones at 2:53, 3:10, and 3:42. You need to Summon Electrogranum at 2:58 to get through the electric barrier. Place the Relay Stones as I did at 3:51.
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