How did valentine kill the death elias the warlock child?

In the story, Valentine kills Elias, the warlock child, by exploiting his vulnerabilities and using a powerful spell that targets his essence. Elias, despite his formidable magical abilities, is ultimately overpowered due to his inexperience and lack of control over his powers. This confrontation highlights the dark themes of sacrifice and betrayal, as Valentine pursues his own agenda at the expense of Elias's life.