Ryan Overturf breaks down the design of his 180-card Final Fantasy VII Cube! You can find the Cube list and follow along on Cube Cobra here: https://cubecobra.com/cube/list/b9fc0b1a-033a-4d8c-b5f6-3ab173791501

And here is the article mentioned about designed a Brothers' War Cube: https://articles.starcitygames.com/magic-the-gathering/how-to-make-a-twobert-cube-of-the-brothers-war/