Laws of the Bloodline-1 (tetralogy in one volume)

"I was the youngest son of a count, to whom fate had prepared an unpleasant surprise. A magical cripple with a maimed source. It sounds like a sentence. I lived far from the behind-the-scenes games of the aristocrats, enjoying
the opportunity to do my own thing and learn about the world. No duels, no provocations from the great houses of the empire. But in an instant, everything was turned upside down... Who knew that my father would be killed, my brother taken captive, and the family ring that transmits knowledge and the secret techniques of the clan would choose me as its new owner?.. From now on, I am the head of the Berestyev family. And this is my story."