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.
NM-Mint - $24.10
NM-Mint Non English - $24.10
Lightly Played - $22.90
Lightly Played Non English - $22.90
Moderately Played - $21.70
Moderately Played Non English - $21.70
Heavily Played - $19.30
Heavily Played Non English - $19.30
Damaged - $15.70
Damaged Non English - $15.70