A cube originally based on "War of the Spark if EVERY Planeswalker had been drawn to Ravnica." The objective is for games to center entirely around Planeswalkers, with plenty of interaction and answers to keep the games two-sided. There are 100 Planeswalkers in the list, and I estimate each player in a draft will end up with around 10. There are no Universes Beyond cards, as the theme stays within Magic canon.
Inspired by the success of the Mech Hangar in my Vehicle Cube: Eiganjo Drift, players begin the game with an Interplanar Beacon on the battlefield tapped. This means each Planeswalker with two or fewer different pips (about 60% of them) can go in any deck!
This cube breaks singleton in every color for its staple effects. All Planeswalkers and rares/mythics are single-copy, but many of the staple effects like those below have an extra copy. The benefit to having an already-perfect design extra present far outweighs the dubiously valuable "variety" of putting a subpar effect with a different name in the same slot.
Archetypes in this cube are largely defined by what the Planeswalkers you draft like to support, or benefit from. There are equal amounts of cards in each non-Planeswalker gold color pair. The Gold Planeswalkers are castable in most or all decks regardless of color, so splashing them across archetypes is easy. Here are some examples of decks you could build around particular Planeswalkers:
Good for Sagas cube, and good for Walkers Cube too!