A cube made to be grid drafted by 2 or 3 players, only composed of portal and portal second age cards.

This cube is composed of 189 cards (or 21 "boosters" of 9 cards, 7 for each player).

If you want to power up this cube a little bit you can add portal three kingdoms cards as some of them tend to be more powerfull than the "tradictional" portal cards.