Complex sentence: Sati reincarnated as Parvati, the daughter of Himavat, king of the mountains, and his wife, the apsara Mena as a result of a boon given to them by Adi Para Sakthi (un-manifested form of Lalita Tripura Sundari or Nirguna Brahman).
Split into simpler sentences: Sati reincarnated as Parvati, the daughter of the mountain king Himavat and his wife the apsara Mena. This was possible due to a boon given to them by Adi Para Sakthi (un-manifested form of Lalita Tripura Sundari or Nirguna Brahman).