After Becoming a Substitute, My Entire Sect Wants Me to Sacrifice Myself

[Reborn + revenge + comeback + strong female lead + satisfying wish fulfillment + sweet romance] The entire sect’s beloved returned, and Song Ling went from being the cherished junior sister to a vessel for soul transference. She was forced to give up her body and expected to be grateful to the sect’s beloved. But when she ripped out her spiritual bones, destroyed her meridians, and plunged into the abyss, her gentle, loving master, her refined and graceful senior brother, and her unruly junior brother all stared red-eyed as they clutched her final keepsake to their hearts.

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Reborn once more, Song Ling resolved to leave the past behind and devote herself to reaching the pinnacle of the immortal path. But...

Can someone tell her where this clingy, sweet little kitten pendant came from? And why is it the King of All Demons?!