Database: card_games
Question: Indicates the number of cards with pre-modern format, ruling text "This is a triggered mana ability." that do not have multiple faces.
SQL: SELECT COUNT(T1.id) FROM cards AS T1 INNER JOIN legalities AS T2 ON T1.uuid = T2.uuid INNER JOIN rulings AS T3 ON T1.uuid = T3.uuid WHERE T2.format = 'premodern' AND T3.text = 'This is a triggered mana ability.' AND T1.Side IS NULL