Time of Need Time of Need rounds out the 2-mana creature tutors
If you wanted [card]Zulaport Cutthroat[/card] to be reach to close out a game, perhaps a Black-White weenie strategy with a multitude of 2/1s for one, including [card]Kytheon, Hero of Akros[/card], along with [card]Drana, Liberator of Malakir[/card] and [card]Sorin, Solemn Visitor[/card] could be fast enough to punish midrange decks
Finally, player auras work the same way
Pauper Another format that can include any card ever printed, but with a far more unique twist
Entomb Look, theres a style of a deck called reanimator that thrives on playing big threats from the graveyard with cards like Animate Dead and the like
Creative Energy packs an electric punch, and then turns up the juice with a combination of artifacts and powerful creatures