http://mtgadventures.blogspot.com/2017/05/the-new-era-cube-theros-block-and-magic.html
I am using my digital collection as a guide. Here is my first pass of the cards I think I want to consider from Khans of Tarkir Block and Origins.
First pass at the BFZ and SOI blocks selection:
http://mtgadventures.blogspot.com/2017/05/the-new-era-cube-battle-for-zendikar.html