As a result of the Super-Soldier serum and vita-ray treatment, Leo is transformed from a frail young man into a "perfect" specimen of human development and conditioning. His strength, endurance, agility, speed, reflexes, and durability are at the highest limits of natural human potential. It has been established that Leo's body regularly creates the super-soldier serum; it does not wear off.
The formula enhances all of his metabolic functions and prevents the build-up of fatigue poisons in his muscles, giving him endurance far in excess of an ordinary human being. This accounts for many of his extraordinary feats, including bench pressing 1100 pounds (500kg) and running a mile (1.6 km) in little more than a minute. Furthermore, his enhancements are the reason why he was able to survive being frozen in suspended animation for decades. Leo is also unable to become intoxicated by alcohol and is immune to many diseases, as he also heals faster than normal.
Mutation from the original Super Soldier serum gave Leo demon-like wings, which could be concealed at will. Leo uses these wings to fly to great heights, and also in battle.
Leo's main weapon is his Buster Sword made of adamantium, a metal which was virtually indestructable. In the hands of an expert, the sword could cut through almost anything when used skillfully.
Leo also has a "claw" gauntlet, which can be used to shoot high intensity beams of lasers, and add strength to the arm which the gauntlet is worn. Leo uses this gauntlet to climb walls and stick to other surfaces too. Sometimes, the gauntlet can be used to block attacks. This gauntlet can also be constantly upgraded to add in more features.