SubZero was already quite the troublemaker before he was even born. His presence in utero was frequently felt by his mother, manifested in the form of many symptoms, including frequent cold flashes, icy urine, and a sudden frozen death. Born Darrin Fletcher in the year 1 B.C. (hence the name) SubZero was born in the middle of a great blizzard; the cold was unbearable, painfully killing his mother while in labor. Miraculously, SubZero froze to life and instantly blossomed into a fully fledged ninja. On the day of his birth, Subzero actually managed to fight off the doctor attempting to spank him by stabbing him with a nearby passing shuriken.