The goal of this cube is to showcase the world of Ixalan, but also to fix the linear nature of drafts in the original Ixalan set. To this end, a bunch of changeling cards from across Magic's history have been included, as well as cards to push typal archetypes into other colors, to add more options during drafting and deckbuilding. There will probably be fewer cards showcasing the underworld, to keep the themes a little more consistent.
The list is still in flux, I am planning to trim it down to 480 cards.