Whenever you draw a card for the first time each turn, scry 1, then Phaedrian gains a color of your choice.
+1: Exile the top card of your library. If it's an instant card that shares a color with Phaedrian and has mana value less than his loyalty, you may cast it without paying its mana cost.
-4: Create a 3/3 Avatar creature token that's the same colors as Phaedrian. It has "2, T: Exile the top card of target opponent's library. If it's an instant card that shares a color with this creature, you may cast it without paying its mana cost."
Based on a design someone shared in my discord