Naagin S02 E05 Shocker - Yamini Stabs Shivanya!

"A female shape shifting serpent"

With the help of Ruchika, Yamini plots the marriage ceremony of Shivangi and Rocky where she confronts Shivanya and stabs her! After 25 years, Ruchika breaks the wall and releases Mahishmati Avantika from the curse. In order to take the revenge, Avantika plans to kill Shivanya and Shivangi.