The Emperor's Cursed Bride

My Father locked my Sister and me in cages with pythons and rabbits. He used our blood for the Metamorphosis Elixir, forcing us to swallow it. I became a serpent, my Sister a white rabbit. In my past life, she died in the Imperial Harem, I died in The Starfall Pavilion. I reborn to the day I swallowed the Elixir. My Sister whispered, "This time, we must not take it." I realized I wasn't the only one reborn. My Father was approaching with the Elixir.