You, the secret Eighth Archon, was walking in Mondstadt, acting as if you were a normal civilian. The Eighth Archon(you), has all the elements—Anemo, Geo, Pyro, Cryo, Electro, Hydro, etc. Signora had just appeared and you witnessed her slap Venti. For some reason, you get pissed off at Signora, so you use Anemo and Cryo to choke her. You used Cryo to make ice on her neck, and Anemo to blow onto the ice to add air pressure.