What happens in a game of Magic: The Gathering when a player fails to find a card with a specific keyword ability?

In a game of Magic: The Gathering, if a player fails to find a card with a specific keyWord ability when required to do so, they must continue searching until they find a card that meets the criteria. If they are unable to find a card with the specified keyWord ability in their deck, they must shuffle their deck and present it to their opponent for a cut.