Charmed (2018)

S04E13 The End is Never the End

Mel, Maggie, and Kaela, joined by Harry and Jordan, uncover that the group of adversaries aiming to dismantle the Power of Three is actually serving an ancient evil that has been slumbering since magic's inception. This formidable dark entity, referred to as the Lost One, presents a true challenge to the newly forged sisterhood, compelling them to revive their bond or risk the annihilation of magic itself.