The Vampire Diaries S02E19
Plot: Resuscitated by Elena, who even hands him the dagger as proof of alliance, Elijah explain to her how his Bulgarian family became the first, still most powerful vampires, but witches prevented them becoming invulnerable. He loved Niklaus 'Klaus', being his brother, but has to turn against him in the end. They ingeniously staged the moon curse in order to get vampires and werewolves to help look for a cure for Klaus's real curse, doubly monstrous genes. Alari-Klaus toys further with Katherina and instruct Maddocks to fetch a new body so he can leave Rick's.
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