While outside in Mondstadt's wilds, Claude will come across several Hilichurls and a Mitachurl dancing around some sort of relic. The relic gives off a palpable aura of Anemo energy. Unfortunately, they will attack him on sight, so he has to fight them for the relic, or lead them on a wild goose chase before coming back to retrieve it.

When Claude touches the relic, he will receive a vision of a towering castle surrounded by a barrier of wind. Stormterror soars above the wind barrier and lands on the towering castle, as if to rest. Claude's sight will be drawn to a section of the castle that juts out, similar to an entrance hall. The stone gate is tightly shut, but there is an obvious indentation in the wall, like a keyhole. Perhaps the missing piece is now in Claude's hands?