Purebloods (The). Other. Unbreakable Vow. Purebloods (La). Otros. Juramento Inquebrantable.
...late) Severus, please, I?m on my knees! I?ve gotta save his life, make this vow with me! Take my hand, it?s an Unbreakable Vow. Understand, it?s an Unbreakable Vow
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