The four-color combinations have official names, but basically nobody uses them since four-color decks just arent that viable or popular
That being said, investing in them now could be slightly premature
Making its debut in 1996 as Pocket Monsters: Red and Green on Game Boy, Pokmon has now become a global phenomenon
And I like the fact that it enables many strategies almost by itself, making cards like Unholy Heat and Traverse the Ulvenwald shine in multiple decks (even in Yorion piles)
Obelisk of Undoing Obelisk of Undoing is a pretty well-known card, and thats mostly because its really common and also really bad
2 Chandra, Dressed To Kill A relatively new addition to the planeswalker pool, Chandra, Dressed to Kill has been a lot better of a card than most people expected she would be