#6 Skithiryx, the Blight Dragon Double Masters, Mythic A large, evasive beater with Infect is one of the last things most will expect, so Skithiryx (popularly nicknamed Skittles during its stint in Standard) can be quite the surprise
With two colors, you'll be able to cast both colors of spells in most games (not all games, but what most players would consider "an acceptably high" portion of games)
The obvious home for this card is in a token deck, since you can either add to your army or built up one unblocked attacker to help you close out the game
Paying exactly enough life to clear opponents threats while preserving your own utility creatures creates asymmetrical advantages that traditional board wipes cannot match
If you are running a Dimir infect deck, you can have Displacer Kitten on the field to exile and return Ichor Rats each time you cast a noncreature spell to further abuse its ETB effect