As most Commanders are three or four or five colors, they will typically hit at least one of those and so they often have "Equipped Creature has Protection from Commanders." The combat trigger is more likely to hit with its dodging around creatures of the given color
Doubly so when you realize the colorless incentives in Standard are mostly colored devoid cards like Ruination Guide and that the best colorless lands make colored mana
In theory, this is a powerful but risky tutor, because if the card you want is in the top six cards of your library or really far down in your library, you could simply lose via decking
Millstone, unfortunately, was not reprinted in Magic 2010, so now the card that defined the slang is no longer in print or even available in the Standard environment
As a creature, she wants you to draw three cards in a single turn
For just three mana what do you get