What started as a small UnStable set cube has branched out to what I consider the other "playable" silver-bordered cards.
The core of the cube is an UnStable set cube as that set was actually designed for draft. Just as in that set three fifteen card packs are drafted, and two contraptions are seeded into every pack.
The cube was initially designed before it was revealed that some cards have multiple versions, so while the copies of those cards in the cube are different it is not large enough to accommodate every version.
The holiday cards in the cube were a Christmas gift from my brother, and the next goal for the cube is to acquire the missing ones.
The contraptions this time.