The Moon

Shroud
The Moon enters the battlefield with seventy-two
hour counters on it. At the beginning of each
upkeep, remove an hour counter from The Moon.
At the beginning of each opponent's end step, if
it isn't an extra turn, that player may remove
twelve hour counters from The Moon. If the
player does, that player takes an extra turn after
this one.
When The Moon has no hour counters on it,
exile it, then target player loses the game.