Magnus watches as Lan Wangji fights Jack. It's like, a freaking masterclass in swordsmanship. On Lan Wangji's side, at least; Jack is still showing off with little flourishes that don't actually ad anything to a fight. Jack has also started singing Call Me Maybe, loudly and incorrectly.

After a few minutes, Magnus slips himself -- and his practice sword -- between Lan Wangji and Jack, and blocks Bichen's next swing.