This 360 cube is built of components. They are:
When you mash these piles together, you're left with a 320 card cube. This is because 40 cards overlap (10 staples -- two from each color --, fetch lands, shock lands, and dual lands) and I refuse to break singleton. Hence, the last 40 cards as designated "glue" to help smooth the experience from the mashing. These cards are either for one of three purposes: