Similar to Porcelain Legionnaire in white, these are two cards that benefit from access to black mana, but that Im willing to put in the colorless section in a Cube because they dont necessitate access to much or any black mana: Dismember was just a game-changing card in Magic, and while Im more likely to use it as an answer to high-toughness creatures in my red decks or meaningful interaction in my green decks, its still high on my list of cards that I like to include in Cubes
With Ultima in play, you can start dropping them early on, even without any additional ramp or mana rocks
So, we need a hero who dares to explore unknown areas, at best supports legendary cards and offers us multiple mana colours
Niv-Mizzet, Supreme Niv-Mizzet, Supreme lets you build a jump-start theme deck using multi-colored instants and sorceries
Card Draw All the dungeon and initiative cards provide card draw of some sort, either small incremental advantages or actual cards drawn, but I did want to include a few other ways to draw more cards in the deck
Ruby cards focus primarily on banishing your opponents cards, but they come at a high Ink cost