Chapter 574: Chapter 574 574: 573. Saint Scepter's Web

Sylvester gazed at the gigantic creature and fell into a moral dilemma. But eventually, he was able to make sense of it and decided against killing the dragon.

Because, at the end of the day, the realm may not know, but Avanss and the King knew that Sylvester was the intruder.

They would know he was the one who killed the dragon, and in the long term, it would ruin his goodwill with his father, ruining any hope of peace between the two realms.