Complex sentence: The usage originates with Richard Bartle's original "MUD1" and "MUD2", and is frequently abbreviated "wiz", which is sometimes used as a verb; to wiz is to become a wizard.
Split into simpler sentences: The usage originates with Richard Bartle's original "MUD1" and "MUD2". It is frequently abbreviated "wiz", which is sometimes used as a verb; to wiz is to become a wizard.