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We already play Firebrand Archer in EDH decks that buff damage, and some of those commanders are in Standard, like Ojer Axonil, Deepest Might / Temple of Power, Ob Nixilis, Captive Kingpin, Urabrask / The Great Work, Taii Wakeen, Perfect Shot, Judith, Carnage Connoisseur, and Imodane, the Pyrohammer

Vexing Radgull Unless you care about radiation counters specifically, Vexing Radgull is actually a less reliable source of proliferation than Thrummingbird

For each 1 life you drain from an opponent, youll gain 2

You could even seize a piece of Magic history and open one of 500 Serialized Mox Jasper cards (available exclusively in Collector Boosters)