Tanya Grotter and the staff of the Magi. Book 5. Emets D.A.

Between the other world and the world of magicians there is a strict law of balance. Nothing can go from the world to the world without violating the fragile balance of forces. But for centuries, the protected balance has been broken. Something extremely valuable is stolen from the other world...

, a strong spirit settles in the mirror, which opens the passage between the worlds. Three mighty ancient gods, Perun, Veles and Trilav, and the keeper of the world tree Simorg demand to return the stolen, threatening to destroy the Buyan and with him the whole magical world...