Recently I read the Cube Root (https://www.pokebeach.com/2016/06/the-cube-root)and I found it quite inspiring as I have recently designed a mutant cube balanced for XY and earlier using cards in my collection. My cube is only a small one at 360 cards plus 20 basic energy of each type, and it will probably need serious rebalancing, but considering that it’s a first time effort, I’m rather proud of the achievement. I only needed one proxy! Anyways, the article has me thinking about card choices (for my cube) and even evolution lines (for if I design an all new cube of a non-mutant nature). Does anyone have idea or recommendations they wish to share?