Complex sentence: An Apache Native American, Proudstar possesses mutant superhuman strength and speed, like his older brother, the short-lived X-Men Thunderbird, though Warpath's power-levels are much higher.
Split into simpler sentences: An Apache Native American, Proudstar possesses mutant superhuman strength and speed. His powers resemble his older brother, the short-lived X-Men Thunderbird, although Warpath's power-levels are much higher.