The choice of planes includes Norn's Dominion because thats too ridiculous to ignore, some wacky phenomenon cards (we can have two of them), and planes that benefit from having small creatures, Naya creatures, or tribal interaction
One of the most fascinating things about Magic: The Gathering is its ever-evolving nature
there are too many separate currencies, Pokmon-style
Standard: In Standard, some of the Sagas will likely see play, but there are relatively few ways to really abuse the enchantments, which means they are more likely to be played as fair cards and used for their effects, and then will spend the rest of the game in the graveyard
While you can evolve as many times as you like during your turn, keep in mind that you cannot evolve a Pokmon on the same turn it came into play