Urza, Lord High Artificer isnt a commander that's here to play fair: It's one of the top cEDH commanders (which is even more impressive given the hard time mono-colored commanders have at the highest tier), and it already has another crazily priced printing: Its Mystery Booster 2 version hovers around $380
: Put a 2/1 white Cleric enchantment creature token onto the battlefield
In a proper Elf deck that produces tons of mana and Elves, this is a quite viable way to end the game with a brutal alpha strike
Banner of Kinship is the definition of an easy win for a list like this
But, as usual, Time Spiral block was the place to break such long-standing rules, and it offered several takes on white countermagic
Even just at your second turn, you could be looking at five or more mana , more than enough to cast a few spells, a higher-cost commander, or some powerful mid-game bomb at the earliest point of the game