About the book: 2006 / The Black Dozen - the best fighters of Tartarus - attacks the gates of Eden. A large detachment of guardians of light, reinforced by a griffin, forces the dark ones to retreat. Trying to escape, the guardians of darkness stumble upon the Valkyries. The leader of the Black Dozen, Tarlantur, dies in the battle. And the Mystical Skeleton of Vobla, the mysterious mockingbird artifact of which he was the keeper, finds himself in the human world. Now both light and dark are looking for the artifact. And Daph and Methodius are trying to find Depresnyak. After all, what ever-hungry hellish cat with wings would refuse a fish skeleton??..