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Rules Text

Whenever you scry, the next instant or sorcery spell you cast this turn costs "Variable less to cast, where X is the number of cards 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.