Twilight Zone/WMG

Rod Sterling is the boy from 'It's a Good Life'.
As an adult, he decided to use his abilities to travel time/ space/ reality/ whatever, and torture and madden those he happens upon for his own amusement. He then narrates as he watches his awful work.

Henry Corwin was always the real Santa Claus.
Until the end of 'Night Of The Meek' he had lost his way in the modern world and forgot his true identity.