Due to the alchemical potion, Nighthawk possesses various superhuman physical attributes. Due to the unique nature of the potion, all of his superhuman attributes are doubled at night.
Superhuman Strength: During the day, Nighthawk possesses sufficient physical strength to lift about 1 ton. At night, his strength increases to the point of being able to lift roughly 2 tons.
Superhuman Stamina: Nighthawk's musculature produces less fatigue toxins during physical activity than the musculature of a normal human. He can exert himself at peak capacity for at least 2 hours during the day before the build up of fatigue toxins in his blood begins to impair him. At night, physical stamina increases sufficiently to exert himself at peak efficiency for at least 4 hours.
Superhuman Durability: Nighthawk's body is tougher and more resistant to certain kinds of injury than the body of a normal human, though he's far from invulnerable. Kyle's bodily tissues are sufficiently toughened to withstand powerful impact forces. He can withstand impacts, such as falling from several stories and being repeatedly struck by a superhumanly strong opponent, that would severely injure or kill a normal human with little to no injury. At night, his body becomes even more resistant to impact trauma, though he can still be injured by bullets or bladed weapons composed of conventional materials.
Superhuman Agility: Nighthawk's agility, balance, and bodily coordination are enhanced to levels that are beyond the natural physical limits of the finest human athlete. His agility is enhanced to twice his normal level at night.
Superhuman Reflexes: Nighthawk's reflexes are similarly enhanced and are superior to those of the finest human athlete, even more so at night.