The chosen color then becomes part of the commander's color identity for the purposes of deck construction
The Destined White Mage plays perfectly with The Destined Black Mage for this reason
Mega Gardevoir EX has two moves that each only use a single Psychic Energy
The combination of white, blue, green, and black gives you access to all the best ramp, exile effects, hard removal for just about every card type, and card draw in the game
When in doubt, effects like Fling, Kazuul's Fury, and the sacrifice-less Soul's Fire help you to get the job done and deal the face damage you so desperately desire
I trust some people are using it fairly, but if you can successfully Ad Naus a decent amount of your deck into your hand, consider your Bracket