Each of the game's six ink colors has different play archetypes, offering different styles of play ranging from aggressive to board control to defensive
Being able to untap any permanent opens a lot of possibilities
It's also in a colour that tends to pull lands out of its deck, increasing the odds of a hit
The Seriema The Seriema is a cool spacecraft commander that tutors for a legendary creature and I can't help but think of this as R2-D2 bringing the X-Wing to Luke Skywalker
Add in Cheshire Cat, Not All There's and Kuzco, Temperamental Emperor's mutually assured destruction, Flynn Rider, Charming Rogue forcing you to discard (just one card), and Mother Gothel, Selfish Manipulator's ability to stop opponents questing, and Emerald decks will quickly become the most annoying to play against
A 7/7 Giant for with reach and trample that brings back all of your lands from the graveyard and then boosts another creatures power and toughness equal to the number of lands you have