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 - $5.50
NM-Mint Non English - $5.50
Lightly Played - $5.30
Lightly Played Non English - $5.30
Moderately Played - $5.00
Moderately Played Non English - $5.00
Heavily Played - $4.40
Heavily Played Non English - $4.40
Damaged - $3.60
Damaged Non English - $3.60