Prince and Princess Drabitsyn-Vorontsov, “royal twins.” In the world - students of the Imperial University and quite ordinary rich heirs. For the initiated - the grandchildren of the legendary Alexander Drabitsyn - “Navi”, hereditary Magi and Sliding Between Worlds, trainees of the “Grey Vervy”. Not everyone can hear the Whisper of the World Tree, not everyone can stand in the way of the creatures of the Abyss. You say that institute technological practice is boring? No matter how it is, you definitely won’t be bored. Especially if you find yourself in a world that needs to be saved. The book combines the cycles “Russian Boyars. Nav", "Clan of Thor" and Dmitry Yankovsky's cycle "Boyars in the Russian Empire".