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6 | Ad Nauseum Rightfully added to the Game Changers list in its most recent update, Ad Nauseum is a premier combo piece in Commander that primarily sees play in cEDH

The Valeyard doesn't need to do anything special for its effect , letting you keep it back as a simple blocker so it's not at risk of dying

You can also use it to kill enchantments and also happens to be among the best artifact removal in green, making Boseiju not just the best nonbasic land destruction but among the best Naturalize effects in the format as well

This signals that Standard is currently defined by the most efficient one-mana creatures and interactive spells, where the game begins in earnest on turn one, and falling behind is not an option

When you have such a high number of existing mechanics, I can imagine that coming up with something both new and fun is very hard