Melira, Sylvok Outcast and Puppeteer Clique would both be good cards in the deck, and together with a sac outlet like Ashnod's Altar allow control of every creature in every opponents graveyard
Of course, 2700 is still a ton of players, on the larger side for Regionals here in the west
That's because EDH players love casting spells, and they hate restraining themselves, even if they ought to to avoid giving another player a big advantage
Thats kind of the point
At the beginning of your end step, create a token that's a copy of target token you control
On the last day of the event, random players are selected from the chat to spellsling against the participants including Richard Garfield, Randy Buehler, Mark Rosewater, Aaron Forsythe and everyone's favorite whipping boy Worth Wolpert