At the beginning of your upkeep, reveal the top card of your library. If it's a creature card that shares a creature type with a creature you control, you may cast it without paying its mana cost. If you don't cast it, put it on the bottom of your library.
Near Mint - $6.75
Lightly Played - $6.50
Moderately Played - $5.50
Heavily Played - $4.00
Damaged - $3.50
Near Mint Non-English - $6.75
Lightly Played Non-English - $6.50
Moderately Played Non-English - $5.50
Heavily Played Non-English - $4.00
Damaged Non-English - $3.50