Those are green-blue, green-black, and green-red
Scar Finally King (Enchanted) With a cost of five Ink, a Strength of five, a Willpower of four, and the ability to earn two Lore per quest, Scar Finally King is one of those cards that earns a place in your deck on its strength alone
These cards are nice because they are doing several things to power you up at once
But then on Sunday the MTG playerbase caught wind of this trend, with a thread on the main MTG subreddit getting thousands of upvotes, followed by an extremely popular vid by AttackOnCardboard directing all eyes towards Moonmist: In other works, the perfect storm for a price spike: Under-printed common suddenly works with a wildly anticipated new set
This means you could play Mutagen Man for a theoretical cost of two green plus five, and you'll generate five mutagen tokens that you can instantly sacrifice for free to give target creatures a +1/+1 counter
On the other hand, if I wanted to wipe your board with Extinguish All Hope, your Summon: Bahamut laughes in my face