OK, I think maybe the back is more of a giveaway
Phelias attack trigger enables you to blink any of your value pieces in play, while simultaneously pumping up the blink target as well - if you blink For two mana, Phelia lands early and provides an increasing amount of value as your boardstate grows, which is sort of the name of the game in Orzhov Blink shells
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Although you can wiff both triggers on Feast and Famine you are at least hitting them with a sizeable threat while they are playing off the top and therefore probably winning
If this dies and you cast it again, it's very likely you're drawing two to three cards if not the full four
8 Mirrorpool I like lands that have effects that can be used when you have either the mana or the need