While waiting for Final Fantasy Limited on Arena , I've been messing around in Standard BO1 these past two weeks, and Izzet Prowess is one of the more common decks I am paired against
Almost every bomb in limited is a creature, and this color combination gives you the most tools to answer them, as well as discard for other bombs
Dont forget the Oracles cousin, Courser of Kruphix, who isnt quite as good (since it doesnt give you the additional land drop), but is quite nice when you play the two of them together
I know 21 commander damage got decided on due to the original cycle of Elder Dragons having 7 power and you getting hit three times equaled 21 but the book quote is just so fitting for our format
One, because of its powerful, game-altering text, and two, for its ability to cause a game to stop and make the entire table go "Wait