It was hissed with such venom she almost missed the word as her brain kicked into overdrive, flying through information to remember what she had read about soulmates in the wizarding world. The Hogwarts library hadn’t had much on the topic, and the rarity of a true mate bond had discouraged her from her usual level of research. From what she could remember, a bond usually didn’t present until both parties were of age and was triggered at eye contact. A sealed soulmate bond was equivalent to any bond created during matrimony and was recognized as such; though unlike a marriage bond, it was unbreakable. During any of these major events, the magic could be felt by additional parties depending on the strength of the bond. Hermione surmised that their bond must be incredibly strong for everyone in the courtyard to have felt the surge as it was triggered. 