Win arcana prize in either of the TI9 Fantasy Leagues (Switch between them from the League dropdown)
Enter the Pro league, similar to official fantasy cards. Rubick arcana 1st prize. Everybody gets 10 packs, but more can be earnt through correctly predicting series scores.
Enter the Heroes league, here you pick a team of 5 heroes, earning points through their picks, bans and wins. Juggernaut arcana 1st prize.