Well, it says that if you spend your mana on an X spell, you get to draw a card and gain life equal to half of X, rounded down
Minwu helps your little Soul Sisters grow large enough to jam, while Aerith can find a home in Legendary Matters decks in addition to Cleric and lifegain decks
Zack Fair is a great 1-drop for aggressive decks in particular
Called Secret Lair Hatsune Miku: Digital Sensation, this next series of six cards is apparently all about "the power of music" and includes a rethemed version of Child of Alara from the Conflux set originally released all the way back in 2009, here called Miku, Child of Song
Yes, white has several enchantments with ongoing card advantage
Most of them also have an ability that tells you how the permanent transforms to its other face