Stephen always really wished to be younger, to relive his childhood.
NOw that he has God powers, he can make his wish become reality.
So with a wave of his hand, and a snap of his fingers, he slowly began regressing. his clothing began to get looser. His pants slipped down a bit. His feet knocked about in his shoes.
he thought of regressing to 20 years old, or to 18, to be a teenager, or to 8, to be a boy again, or to babyhood. But made himself still able to keep his God powers.
he started breathing heavily, and he was shrinking down as well.
He lost 1 year of age, then another, and another, and another...
Which age did Stephen the omnipotent man regress to