You can get permanents back to the battlefield (and that includes fetch lands), creatures that ETB and draw a card, auras, and removal spells like Oblivion Ring
With a 30 year history, the catalogue of cards to choose from is now around 50,000 strong and seems to be growing ever faster, with more and more recent and future releases
Boundless Realms gets you more lands and its not dependent on you having any creatures, though
The Bounce Lands [Highest Mana Multiplication for Value Decks] Primary strength: Mana efficiency Bounce Lands generate value by producing two mana from a single land drop , effectively acting as both a land and a resource multiplier
Zenos baseline power can be an amazing board wipe for creature tokens and weak creatures alike everyone but him and his rival
Ishkanah, Grafwidow Ishkanah, Grafwidows delirium ability and Golgari color identity make a great delirium commander for a self-milling EDH deck