The life of a Soviet bio-weapons designer Vladislav Kerenski ends with a bang. He is reborn in a small mountain village called Skyisle and discovers that the System underpins the development of all life in a fantasy-world Novazem where magic rules supreme. Using the scientific method and his knowledge of history, administration and biochemistry he attempts to understand and utilize everything around him including the System itself.

A rational, progression litrpg with giant monsters, wholesome moments, trope subversion, lots of art and vast multitudes of historical references. 
A light novel about a scientist too clever for his own good and the specter of a girl who was destined to die, bringing light of hope to a subjugated nation ruled by oaths and beset by revenant abominations.