The most popular method is to assign one or more keywords per faction (usually only one if there are four or more factions)
Without access to the graveyard, the way these decks win games is either significantly slower and more fair (often creature beatdown), or shifts entirely to an alternative post-board plan, such as Goblin Charbelcher out of Oops All Spells
When he deals damage to a player, you can flicker any number of nonland permanents you control
Many Cubes include Chaos Orb as a colorless Vindicate, but I want to maintain some of the original feel, so I instead decided that you still have to flip the cards onto the table, but they will only affect one thing of your choice that they touch instead of everything
PERFECT GIFT FOR FANS - This set makes for a small but thoughtful stocking stuffer for any MTG player, enhancing their gameplay experience even further.
Rinse and repeat until everyone has opened three packs and you have a card pool which you'll use to build a 40-card minimum deck