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.
NM-Mint - $33.60
Lightly Played - $32.00
Moderately Played - $30.30
Heavily Played - $26.90
Damaged - $21.90
NM-Mint Non English - $33.60
Lightly Played Non English - $32.00
Moderately Played Non English - $30.30
Heavily Played Non English - $26.90
Damaged Non English - $21.90