When Trial of Knowledge enters, draw three cards, then discard a card. When a Cartouche you control enters, return Trial of Knowledge to its owner's hand.
NM-Mint - $6.30
Lightly Played - $6.00
Moderately Played - $5.60
Heavily Played - $5.00
Damaged - $4.10
NM-Mint Non English - $6.30
Lightly Played Non English - $6.00
Moderately Played Non English - $5.60
Heavily Played Non English - $5.00
Damaged Non English - $4.10