What is the Magic Online Cube?
The Cube is a special selection of 720 single Magic cards, no duplicates, that is assembled by R&D. At the end of this article, you will find the cards that have changed. These cards are randomly divided into Cube booster packs that are used to run Draft and Sealed events in Magic Online. The cards in the Magic Online Cube are changed regularly, with new cards replacing some cards in the past Cube.
Want to know more about the events? Visit MTGO.com and read Mike Turian's article about this latest iteration of the Cube.