I particularly love how it basically makes all your Equipment cards into mana rocks, but the really cool part of Urza is its activated ability, which is an improved Temporal Aperture, a nifty old artifact from Urzas Saga
This means you need at least three creatures in play to go mana positive
You dont really want to answer Sheoldred, the Apocalypse with this, but against a big token or a Voltron commander, this is perfect
Of course, heavy use of auras can easily be the build for any of these commanders, and theres some overlap on the lists, but I look toward some broader build options here
This features new artwork that shows off the progenitor of Innistrad's vampires
This makes the card shown off all the more fitting