As Ryuk explains, Light can burn the page with Watari's name on it within the 48 hours to cancel his impending death; however, this method can only be used to save a victim of the Death Note once.
Light can burn the page with Watari's name on it within the 48 hours. This is to cancel his impending death. Ryuk explains. This method can only be used to save a victim of the Death Note once. This was however.