When Duelists' Convocation International enters the battlefield, choose a 10-digit number at random and write it down. Whenever you play a land or cast a spell, if it shares a mana value with one or more uncrossed digits in the chosen number, cross out one of those digits and draw a card. Then if all ten digits are crossed out, you win the game.
Near Mint - £0.40
Lightly Played - £0.30
Moderately Played - £0.30
Heavily Played - £0.20
Damaged - £0.10
Near Mint Non English - £0.40
Lightly Played Non English - £0.30
Moderately Played Non English - £0.30
Heavily Played Non English - £0.20
Damaged Non English - £0.10