Tanya Grotter and Pince -Nob. Book 7. Emets D.A.

Guri Pupper calls Vanka Valyalkin to a magic duel! High above the ocean, Vanka burns a spark broom of Pupper, and he falls down. Everyone considers Vanka a killer and want to put him in a magical prison for Dubodam. To avoid punishment, Vanka goes to the world of Lopukhoids to Ninel and Herman Durnev and hides in their house. In the end, Vanka is forced to fly to oak and give up. He is thrown into prison. The plague-del one in someone else's body offers Tanya Grotter a deal-the plague will help her go to Dubodam and save Vanka, and Tanya will give her her body in return...