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 - $0.40
Lightly Played - $0.30
Moderately Played - $0.30
Heavily Played - $0.30
Damaged - $0.20
Near Mint Spanish - $0.40
Lightly Played Spanish - $0.30
Moderately Played Spanish - $0.30
Heavily Played Spanish - $0.30
Damaged Spanish - $0.20
Foil Prices
Near Mint Foil - $1.30
Lightly Played Foil - $1.00
Moderately Played Foil - $0.90
Heavily Played Foil - $0.80
Damaged Foil - $0.70
Near Mint Foil Spanish - $1.30
Lightly Played Foil Spanish - $1.00
Moderately Played Foil Spanish - $0.90
Heavily Played Foil Spanish - $0.80
Damaged Foil Spanish - $0.70