Not only are they great for refueling in the late game, but you can turn your Twiddle effects and unusual cards into additional tap effects
It works just as well with red effects that care about them coming into play, like Reckless Fireweaver and Hedron Detonator
Cards that produce multiple tokens , like Heroic Reinforcements and Prideful Parent, are key
There are all sorts of ways to take advantage of a cheap 12/12, and cards that care about the twelve-mana cost of your commander, to make building and playing the deck a lot of fun
Im confident that all serialized copies of Ragavan, Nimble Pilferer will cost an arm and a leg due to its playability
a demonic blessing, which grants him power