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I've already used him in a decklist around a Gruul Commander, Targ Nar, Demon-Fang Gnoll, that also has an attack trigger (it's here)

As long as all four players are left in the game, this commander will create five artifact tokens for its controller whenever it enters the battlefield or does damage

Culling Ritual is only worth about 60 cents

Yet even as a simulation, he holds nothing back and it will take everything you have to beat him

Can You Proliferate Summons

Sure, there are plenty of creatures to be swinging in with, but if youre trying to focus on milling your opponents through radiation counters, youre going to need to make a few upgrades to keep the proliferation up