whenever you scry, the next instant or sorcery spell you cast this turn costs x less to cast, where x is the number of cards you looked at while scrying this way.
+2: draw a card, then scry 2.
-3: exile the top card of your library. create a number of 1/1 blue faerie dragon creature tokens with flying equal to that card's mana value.
elminster can be your commander.