Remove Amulet of Quoz from your deck before playing if you're not playing for ante.
{T}, Sacrifice Amulet of Quoz: Target opponent may ante the top card of their library. If they don't, you flip a coin. If you win the flip, that player loses the game. If you lose the flip, you lose the game. Activate this ability only during your upkeep.
Near Mint - $1.40
Near Mint Non-English - $1.40
Lightly Played - $1.30
Lightly Played Non-English - $1.30
Played - $1.00
Played Non-English - $1.00
Heavily Played - $0.90
Heavily Played Non-English - $0.90
Damaged - $0.70
Damaged Non-English - $0.70