Complex sentence: Machete realizes Voz was the one who killed Sartana and then fights him and severely burns his face, disfiguring him to the extent that Voz is forced to wear a metallic, silver mask.
Split into simpler sentences: Machete realizes Voz was the one who killed Sartana and then fights him. Machete severely burns Voz face, disfiguring him to the extent that Voz is forced to wear a metallic, silver mask.