Of course, this is From the Lab, and a regular old Dragon tribal deck isn't quite my style
Remember: the two most important formats for all of these cards, Modern and Commander, didnt even exist when Fifth Dawn was printed
Wild-Magic Sorcerer This is the nice spice for Prosper, Tome-Bound
At this point Isshin started going off and nearly killed me with a combination of Tectonic Giant, Krenko, Tin Street Kingpin, Isshin, Two Heavens as One, Aurelia, the Warleader but they tapped out for Dihada, Binder of Wills to give Krenko vigilance, lifelink and indestructible
As TCGPlayer points out, you can grow her attack power with something like Titanic Growth and then use Fabled Passage to double it again
It cares about ramping up a lot of land so they get access to a lot of mana earlier than their opponents