Yu Mo Gui Gwai Fai Di Zao (妖-yiu 魔-mo 鬼-gwai 怪-gwaai 快-faai 哋-di 走-jau) was Uncle's chant throughout the show to defend against as well as to defeat supernatural forces of evil.

It literally translates to: "Spirits, demons, ghosts, monsters, quickly leave!" or "Evil demons and malevolent spirits, be gone!"

Though the primary, obvious purpose is to banish evil, Uncle had utilized it in a variety of ways:

Exorcism

Portal Creation

Locating the Noble Animals

Transferring Demon Chi

Transferring human chi

Energy combat

Countering other forms of magic

Yuumo Gwei Gwai Fai Dee Zao

Trivia