Turiel, Hero Immemorial

Immortal (Start the game with this creature on the
battlefield. Whenever this creature dies, exile it with
3 time counters on it. Whenever the last time
counter is removed, return this creature to the
battlefield.)
At the beginning of each player's upkeep, that
player may choose to pay 3 life. If they don't,
that player sacrifices a land they control.