Thats too specific for the contents of this list
Between early aggression thanks to cards like Cursed Merfolk, the tempo gained by the Amethyst bounce package, and a top end from shift characters like Pegasus Cloud Racer and Ursula Sea Witch Queen, Emerald/Amethyst has all the tools needed to win you a Scar Heartless Hunter promo while still being a blast to play
Over the course of our match I taught him everything I knew as best I could, and before the end, he beat me
Its not a huge theme, but Rydia, Summoner of Mist, Garnet, Princess of Alexandria, and Yuna, Hope of Spira are all great payoffs for playing summons
They also both have Flashback, which means theyre essentially two creatures in one
Unless Tarkir: Dragonstorm totally pushes Dimir out of the format come April, I can see Emet-Selch seeing serious Standard play