Thunderbird (Proudstar) (Marvel Comics)

John Proudstar, also known as Thunderbird, is a character from the Marvel franchise. He is a mutant who received his superhuman abilities from being born with a genetic mutation caused by the X-Gene. Thunderbird has a brother who is also a mutant, Warpath.

Superhuman Powers
Superhuman Strength: Thunderbird is superhumanly strong and can lift approximately two tons under optimum conditions.

Superhuman Stamina: Thunderbird's muscles produce less lactic acid than the muscles of ordinary humans. He can exert himself at peak capacity for several hours before fatigue begins to impair him.

Superhumanly Dense Tissue: Thunderbird's muscle tissue is three times as dense as that of a normal human being's and is distributed in such a way so as to give Thunderbird massive shoulders, arms, and thighs. His skin is several times as dense as that of a normal human being's and includes an additional layer of leather-like epidermis. Superhuman Respiration: Thunderbird's lungs are oversized, and his respiratory system is developed in such a way so as to allow him maximum wind and endurance with a minimum oxygen intake. These features make Thunderbird a natural outdoor fighter and athlete.
 * Superhuman Durability: Due to the increased density of his skin and muscle tissues, Thunderbird's body is somewhat more resistant to physical injury than an ordinary human. Although far from invulnerable, he is capable of withstanding impact forces and blunt traumas that would severely cripple or kill ordinary humans with only mild to moderate discomfort.