There are so many cards you can consider in your deck and so many different ways this deck can evolve that I expect we will see it played quite a lot in competitive events
Isshin is a Mardu Wulfgar, and looks set to be a flexible build, whether you prefer Pillowfort or turning everything sideways Ive put together a primer you may be interested in here
Conversely, players should draw before scrying if they're not looking for a specific card, as scrying first would be wasted
Beseech the Mirror Eliana: I imagine this pick is far less surprising coming from me
The game takes place in a Westeros-like world of political intrigue, only rather than a few pesky dragons and an army of zombie-like White Walkers, each nation has access to a Dominant, a citizen who can transform into one of the franchise's legendary Summons
You can also play Celestial Dawn, Joiner Adept, Dryad of the Ilysian Grove, and Prismatic Grove to fix all of your color problems at once