You may exert Champion of Rhonas as it attacks. When you do, you may put a creature card from your hand onto the battlefield. (An exerted creature won't untap during your next untap step.)
The only way to finish the Trial of Strength is with a basilisk scale in hand.
Near Mint - $100
Lightly Played - $100
Moderately Played - $100
Heavily Played - $100
Damaged - $100
Near Mint Spanish - $100
Lightly Played Spanish - $100
Moderately Played Spanish - $100
Heavily Played Spanish - $100
Damaged Spanish - $100
Foil Prices
Near Mint Foil - $500
Lightly Played Foil - $400
Moderately Played Foil - $400
Heavily Played Foil - $300
Damaged Foil - $300
Near Mint Foil Spanish - $500
Lightly Played Foil Spanish - $400
Moderately Played Foil Spanish - $400
Heavily Played Foil Spanish - $300
Damaged Foil Spanish - $300