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 - $22.300
Lightly Played - $17.800
Moderately Played - $15.600
Heavily Played - $13.400
Damaged - $11.200
Near Mint Spanish - $22.300
Lightly Played Spanish - $17.800
Moderately Played Spanish - $15.600
Heavily Played Spanish - $13.400
Damaged Spanish - $11.200