You can tutor for this with Urza's Saga, by the by
Final Fantasy x MTG , the upcoming Magic set that will drop mid-June, will introduce the bird commander that this typal archetype needs to finally spread its wings: Choco, Seeker of Paradise
The exact amount of land youll want is dictated by how high the mana costs in your deck are and also whether or not youve got reliable ramp (always have a Sol Ring) or if youve got other ways of playing your cards, such as bringing them back from the graveyard after discarding them
I like eeveelutions too, but while terrastallization was interesting mechanically, I thought the crystal-look and type hats looked dumb
By forcing opponents to have it, you can see what they could play, and more importantly, what they didnt