Yoni Skolnik, a principal game designer at Wizards of the Coast, wrote in a June blog post that green-white best aligned with the identity of a summoner, which explains why both Yuna and Garnet from Final Fantasy 9 share that color spread
This version of the deck solves that problem with Maui - Hero to All , a character with Rush and Reckless that can take down practically any threat your opponent might play
That sets you up to steadily amass lore, and be rewarded with cards if an opponent tries to stop you by taking Mad Hatter, Gracious Host out of the picture
Mono-Black Aggro, various Mono-Red Aggro decks, and Five-Color Niv-Mizzet will try to overload you with removal, but you have coverage down the line there with Apostle of Purifying Light, Lagonna-Band Trailblazer (four toughness is basically protection from red), and Stonecoil Serpent
At the top end, Aurora Dreaming Guardian takes advantage of the existing Aurora Regal Princess as a shift target and can Ward your important Characters to keep them safe from certain removal options