Blue/white/X control is in a great position to make a big comeback in Modern. The deck has a lot of game versus many of the top decks in the format. In particular, it can be built to smash Grixis Shadow, Hammer, Titan and Omnath.
Using Evart Moughon’s original Deck Guide as a reference, I’ll give you some updated advice for succeeding with Azorius Control in the current Modern field.