Pretty sure they copied the system game style feature from this book and implemented it to a new anime called “solo leveling” I haven’t watched it yet, but the description says so. But 10/10 story
Fantasy · JKSManga
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Webnovel 
Pretty sure they copied the system game style feature from this book and implemented it to a new anime called “solo leveling” I haven’t watched it yet, but the description says so. But 10/10 story
My Vampire System
Fantasy · JKSManga