What if we want to allow for mulligans, card draw, mana rocks, searching our library for lands (or cards in general), playing multiple lands per turn, et cetera
Which is your favorite creature
The Backup Swarm Shambler is the absolute best 1-drop the deck could ever ask for
Arkani-ex (155/130) Fearless Terastal This illustration of Arkani-ex looks almost like a movie scenefull of dynamism, power, and brilliance
Set Boosters Zendikar Rising also introduces a new kind of booster pack: Set Boosters
Outside of these environments, Urza can still be quite good, as he generates 2 bodies for 4 mana, provides a mana sink with a powerful payoff when needed, and can even turn things like Equipment and Sapphire Medallions into tools to race ahead of your opponents while still employing their inherent value