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Insatiable Avarice The spree on Insatiable Avarice allows for two powerful sides to this card that are quite strong

I would also look into the R/W deck with which Ben Lundquist took first, but my concern is the fact that the Boros Elites in the deck need a critical mass of creatures to reach their potential, giving you a vulnerability to Thoughtseize and spot removal that aggro decks dont typically have (at least not to that degree)

this is an instant board that grows over time until it becomes powerful enough to wipe out your opponents

Teferi's Sentinel is just a vanilla 6/6 creature if you control a Teferi, so its not that exciting