Database: card_games
Question: Name the card and artist with the most ruling information. Also state if the card is a promotional printing.
SQL: SELECT T1.name, T1.artist, T1.isPromo FROM cards AS T1 INNER JOIN rulings AS T2 ON T1.uuid = T2.uuid WHERE T1.isPromo = 1 AND T1.artist = (SELECT artist FROM cards WHERE isPromo = 1 GROUP BY artist HAVING COUNT(DISTINCT uuid) = (SELECT MAX(count_uuid) FROM ( SELECT COUNT(DISTINCT uuid) AS count_uuid FROM cards WHERE isPromo = 1 GROUP BY artist ))) LIMIT 1