This tantra practice is based in indian tantra. It is simple and effective. Numerous practices of Tattwa Shuddhi have developed from a few teachers over the past few decades. Two that I know of are one from Swami Rama and Swami Satyananda. I often practice this. It can be used in both left (vama) and right (dakshina) handed tantra practice. It is the practice of purifying the chakras and their corresponding elements. It works all the constituents and is a jumping off point to samadhi and awakens kundalini and allows it to travel to sahasrara. For more info see the book Tattwa Shuddhi by Bijar School of Yoga.