The Favored Concubine

The Favored Concubine manga summary: A girl who has lost her memories, Ah Kong, falls into a cold pond in the forbidden area of the Yan Sect. The first time she meets Yan Mo, he almost kills her. A mythical beast that's been in slumber for the last millennium suddenly awakens, the True Demon's Eye is opened, and a series of strange events follow -- all seemingly brought on by the arrival of Ah Kong, this mortal girl.