While it may take a bit to build up to, thanks to Dragon-God only coming in at 4 loyalty, his -8 ability can be an immediate victory if your opponents don't control a legendary creature or planeswalker
Voltorb and Electrode serve as great substitutes until you get the ball rolling with your EX cards
Synchro: Banish 3 random face-down cards from your opponent's Extra Deck, face-up
This card's variable casting cost allows you to put Angels on the battlefield while holding up mana for counter magic you happen to have in hand, and a single card that can fill your entire board is always a welcome inclusion in a format like Commander
If you control more than one legendary creature with the same name and the "legend rule" begins applying again (perhaps because Council of Reeds leaves the battlefield), you'll immediately have to comply with the rule and put all but one of those permanents into the graveyard
There are multiple cards in most sets that are white and gain life