For your lagna one graha rules two key houses — one of the 1st, 4th, 7th or 10th, and the 5th or 9th: a Yogakaraka, a Raja yoga in one graha. It gives rise and success in its dasha and lends its good to any graha joining it — Shani for Vrishabha and Tula, Mangal for Karka and Simha, Shukra for Makara and Kumbha. Well placed it lifts the whole chart; weak, it gives its gifts later.
