At the beginning of your upkeep, exile the top X cards of your library, where X is the number of card types among other nonland permanents you control
Glivedive Duo is a good example: a Bat/Lizard whose enters the battlefield ability also makes it effective in the different animal archetypes (as well see below)
Cool Note: The Ultimate Guard Boulder 80+ comes in loads of colors and as a top and bottom part
4*Town, Hottest Band Of The Year The fourth and final character card from this reveal is 4*Town, Hottest Band of the Year, a four-ink, 5/5 card that has Singer 5, meaning it counts as cost 5 to sing songs
So what is the class out there for your decks
Even as-is in a two-color deck, it's a powerful tool to fetch a two-drop critter, sorcery or instant from your deck and cast it