mtg cards like explore Growth Spiral - Instant - Explore the Underdark | Magic:

Black Not bad

For example, characters like Aang, Katara, and Sokka all have a card dedicated to them in one or two colors, gradually progressing to three or more colors

[2] [3] [4] [5] From 2008 to 2016, over twenty billion Magic cards were printed as the game grew in popularity

Its name is an anagram of 'Universes Beyond', its mana cost is two colourless, and then blue and black (UB), and its dubbed a 'Universewalker' rather than a regular MTG planeswalker

A great example is a deck I profiled last year, Joel Micks Alpha Elves. At its essence, this deck is just three unique cards: Forests, Llanowar Elves, and Giant Growths

The other big thing is Oil, which is focused more in Red and Blue