Open a sealed Magic booster pack, reveal the cards, and put one of those cards into your hand. (Remove that card from your deck before beginning a new game.)
Make your judgment wisely: The right pack will let you defeat your nemesis, but a poor choice can only end in torment. And Homelands.
Near Mint - $12.10
Near Mint Non-English - $12.10
Lightly Played - $10.90
Lightly Played Non-English - $10.90
Played - $8.40
Played Non-English - $8.40
Heavily Played - $7.20
Heavily Played Non-English - $7.20
Damaged - $6.00
Damaged Non-English - $6.00