This cube is made of the "Guild of Ravnica" (GRN) and "Ravnica: Allegiance" sets. What makes it special is the fact that there are no mono-colored cards, only dual-colored cards with a couple colorless guild mana rocks. Therefore, instead of drafting for specific colors of the 5-color-wheel, you draft for specific-color pairs of the 10 guilds of ravnica where you try to get guilds sharing a color. This makes drafting this cube a very unique experience already.

The list of this cube is very simple: Looking at all the dual-colored cards from those two sets (not including planeswalker-decks-exclusives), they were added based on their rarity. 1x added if the rarity is Mythic or Rare, 2x added if Uncommon, 3x added if Common. There are two exceptions for this: The guildgate lands were added 4x each and the mana rocks (guild lockets) were added 2x. This now results in 360 cards total with all color pairs having exactly 36 cards representing them.

These cards can also be turned into a battle box of 10 decks - 1 deck of 60 cards for each guild. Simply take all cards of a color pair (36 cards) and add 1 of every common except the guild Locket (4 commons) and 20 basic lands (10 of each color of said color pair). Now you have 10 roughly evenly-matched pioneer decks to play each other. Of course, the function of so many basic lands in decks that consist only of dual-color spells is a bit questionable, but being able to use this cube this way is still a nice alternative way to enjoy it.