Clock of Doom

Find something to represent the clock hand on
Clock of Doom. Set it at 1:00.
At the beginning of each upkeep, move the hour
hand over one hour.
When the clock reaches 12:00 on the clock, target player playing any game of Magic: The Gathering
loses the game.
"Uh... Maybe we shouldn't mess with that thing!"
-Someone before they died to the Clock of Doom