Complex sentence: Unlike Azazel's other special children, who start off with a psychic ability, Jake first discovered his ability to use super strength--when he effortlessly lifted a Jeep off of a soldier who had been trapped underneath.
Split into simpler sentences: Unlike Azazel's other special children, who start off with a psychic ability, Jake first developed the ability of super strength. He first discovers this when he effortlessly lifted a Jeep off of a soldier who had been trapped underneath.