Another one of my favorite examples, that is probably underappreciated outside of the Alpha context because its power is more subtle, are the Psychic Venom decks
This theme continues through to one of the other new mechanics, Emerge , which appears on giant Eldrazi creatures with colourless mana costsbut with the option to burst forth from your existing creatures for coloured mana, getting a discount in exchange for sacrificing one of your allies
This card is able to stab its way through any creature and exile them, making it a powerful tool in many decks
Being in a competitive environment like this, I think it teaches him to be gracious in losing
It might just kill a two drop but that is all good when you are leaving them with only lands and hitting in with a couple of guys and perhaps even doing other stuff
While this was originally true when the format first released, it has since evolved to become more straightforwardly Commander, but on Arena