Shadow of the Dragon Clan Candle Dragon

He is not here to slay the dragon, he is here to steal the secret party's dragon-slaying technique. Lin Yuan, the youngest "spy" of the Zhulong organization, sneaked into Kassel with an impossible mission: to steal violent blood technology and monitor an S-class loser named Lu Mingfei. His Word Spirit [Setsuna] was judged to be "useless", but the organization told him that with the violent blood, it could evolve into a high-level Word Spirit [Yu Le (Time Zero)], at the cost of burning his life. One year, he only gave himself one year. But he didn't expect that during this year's undercover career, he would meet Chu Zihang. That taciturn senior brother would give his back to him at the critical moment of life and death; he would be covered in blood on Odin's Night, but still whisper: "Lin Yuan, you go first." When the organization's secret order came - "Target: Chu Zihang. Recover his violent blood samples, with priority given to living bodies." Lin Yuan stood in the heavy rain, and for the first time, he didn't know who to aim the Tang Dao in his hand. He hadn't lurked for so long just to be the knife that killed his best friend. This is the story of a spy who betrays his organization and chooses to side with his brother.