MMCY-04 : The Maha Mantra Crystal Yantra - 04 (MMCY-04) is a powerful visual manifestation of the Sri Navagraha Preethi Mantra. This Sacred Geometry Yantra performs all the functions of the conventional, religious Sri Navagraha Preethi Yantra, also known as Sri Navagraha Shanthi Yantra : Horoscope Rectification, Correction of Graha Doshas; Appeasing Planets (Navagraha Preethi) - for a full family, but in a better way, as it is more powerful and ...