the master mtg card Commander Deck EDH Deck Mike, Dungeon and Will the Wise – Moonveil Games Spend this mana only to cast noncreature spells Chainer, Dementia Master — Commander

So, with cards that give you the ability to draw and then discard one, or even when an opponent makes you discard a card, you just get to swing on people for, relatively, free

As for the other bans in the Magic: The Gathering ban list update, they are mostly for similar reasons

Speaking of artifacts, The Immortal Sun is an easy add to a Boros deck

But over time the loose phenomenon Ill call Commander creep led R&D to relent and furnish us with this little gem

That's a much better Rogue's Passage base, but there are the obvious restrictions there to make it not as great since you need two targets

Outlaw theme.Speaking of outlaws, who's out there stirring up trouble