A cube built around cards printed in Ravnican sets. This includes the standard-legal Ravnica sets, as well as the Ravnica duel decks of Izzet vs. Golgari and Jace vs. Vraska. I've also reserved the right to add any card that isn't printed on Ravnica, but is undoubtedly set on the plane (i.e. Seal of the Guildpact). Happy drafting!