Of all the cards that are designed by Aaron Miller, how many of them are incredibly powerful?
designed by Aaron Miller refers to artist = 'Aaron Miller'; are icredibily powerful refers to cardKingdomFoilId = cardKingdomId AND cardKingdomId is not null
SELECT SUM(CASE WHEN artist = 'Aaron Miller' AND cardKingdomFoilId IS NOT NULL AND cardKingdomId IS NOT NULL THEN 1 ELSE 0 END) FROM cards