Quotes / Magically-Binding Contract

Ron: You can't break an Unbreakable Vow.
Harry: I'd figured that much out for myself, funnily enough. [...] What happens if you do break an Unbreakable Vow?
Ron: You die.

— Harry Potter and the Half-Blood Prince

"An agreement has been made, and you are bound to it. Break it, and this spell will devour your core."

— Kezess, The Beginning After the End

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