The title of the book is also called: [Lord of Black Thorns]
In a world eroded by darkness, only those who pierce the rules can survive.
Ren Croft, a modern strategy game designer, accidentally traveled to a different world eroded by the "Black Tide". He became the illegitimate son of a border baron and inherited a cursed territory - Blackthorn Valley. The land here is barren, monsters are rampant, and the people are numb. What's even more frightening is that the "black tide" that sweeps the continent every three years is approaching.