"Zlydnev Mir", a novel, 2011, the first volume of the eponymous cycle.
Waking up after being struck by lightning and having lost his memory, Poltinnik leads a quiet life as a peasant, scattering manure and swapping one “wife” for another. But his past relentlessly catches up with him: a bag of armor found by chance awakens a sleeping beast in him. After killing the baron, he becomes an outcast and sets out to find himself, unexpectedly joining the ranks of a powerful Army that wages a holy war to free mankind from mages.
Meanwhile, his former comrades—Sokol (Kurenok), One-Eyed, and Bolshaya Shishka—have turned a handful of madmen into a formidable force. But their ideals collide with the harsh reality of big politics, and the sudden appearance of a new enemy, the cunning and merciless Jarl, threatens to destroy everything they have achieved. The fates of Sedoy and his old friends cross again in a whirlwind of intrigue and bloody battles, where everyone must choose between loyalty and betrayal.
*Due to the large volume, the reader split the first volume into five parts (books).