The pinnacle of power, Saitama's strength becomes limitless in his serious mode. With absolute strength, speed, reflexes, and durability, he can obliterate anything in his path. His hyperspeed perception, unmatched combat skill, and ability to create devastating shockwaves make him unstoppable. Resistant to gravity, intangibility, and extreme conditions, he adapts endlessly, creating unpredictable moves on the spot. His "Serious Punch" shatters the very fabric of reality.