Whenever Tyrannosaurus Rex attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs.
Near Mint - $21.70
Lightly Played - $17.30
Moderately Played - $15.20
Heavily Played - $13.00
Damaged - $10.90
Near Mint Spanish - $21.70
Lightly Played Spanish - $17.30
Moderately Played Spanish - $15.20
Heavily Played Spanish - $13.00
Damaged Spanish - $10.90