Mizzixs Mastery The classic Cube Izzet top end works well in Commander as well when the graveyards can get even bigger
First, both Rampaging War MammothRampaging War Mammoth and The Balrog of MoriaThe Balrog of Moria (11,456 and 24,703 decks, respectively) are scary creatures in their own right
It served me well, and will be missed
At the moment, Mono-Black Aggro and variations on Field of the Dead are dominant, but how much so
Forces of the Imperium - Inquisitor GreyfaxInquisitor Greyfax Neither of this commander's abilities are game-breaking, but they're both subtly quite powerful (especially when the political nature of Commander is considered)
Theres also the Painter's Servant lock, where you set all spells to be the same color and now people cant play spells at all