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There are lots of oil counters in the format and proliferate, but 10 is still a lot of counters

If we assume that both mana flood and mana screw are things that we'd like to avoid in order to have a fun game of Commander (and maybe even a chance at winning the game), then adding more MDFCs to your deck during deck building is the perfect solution to the problem

Black and other colors gain life all the time, often by draining it

You can do a lot when you constantly wheel away your hand, especially if you want to set up Underworld Breach

We already have Swords to Plowshares to exile creatures, and Dust to Dust serves a similar purpose for artifacts