Players are competing in the second day of the Arena Open for their chance to win up to $2000 USD in cash prizes for reaching 7 wins before 2 losses (or $1000 USD with 6 wins) in best-of-three (BO3) Standard. Make sure to check out more decklists, especially the BO1 decks from the first day of the tournament:
Here are all the 7 win decklists (and some more interesting 6 win ones) that we know of so far, and more later on when Wizards of the Coast publishes them all.