"The Whip of Dutur" is the novel by Ivan Lagunin, the third book in the cycle "In the Skin of the Demon".
Our Hero’s state is growing and strengthening, swallowing and subjugating surrounding lands. But the time is coming when instead of local tribes and warriors, units like his own will stand against his army—units that despise death and adore their Leader—the true Son of Dutur.