Phased out creatures haven't left the battlefield, they're still on the battlefield, but card effects treat them as if they were not. They don't exile and return or something like that; they just become "phased."
Context: My meta is non-infinite combo. We play with powerful cards, but mainly just for value. 7-8 power level.
Initial thoughts: I've always wanted to brew around Aluren, but don't know if there's enough value 3 cmc and below creatures to make it work. I like the idea of Teferi's Veil in this deck. Phase creatures out and reap the Kodama rewards when they phase in. Other than that, I don't really know where to go.