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 - $0.95
Lightly Played - $0.90
Moderately Played - $0.71
Heavily Played - $0.57
Damaged - $0.38
Near Mint Non-English - $0.95
Lightly Played Non-English - $0.90
Moderately Played Non-English - $0.71
Heavily Played Non-English - $0.57
Damaged Non-English - $0.38
Foil Prices
Near Mint Foil - $0.95
Lightly Played Foil - $0.90
Moderately Played Foil - $0.71
Heavily Played Foil - $0.57
Damaged Foil - $0.38
Near Mint Foil Non-English - $0.95
Lightly Played Foil Non-English - $0.90
Moderately Played Foil Non-English - $0.71
Heavily Played Foil Non-English - $0.57
Damaged Foil Non-English - $0.38