Aria's Pov
My stomach churned at the memory of that poor boy's injuries. To think he'd met such a violent end...
"My investigation suggests that whoever orchestrated the attack knew about the magic I performed on seven people in that house years ago," Margaret explained. "Seven is a powerful number in magic. Performing white magic - or dark magic - on seven individuals simultaneously always leaves behind magical imprints that can be reactivated later. That's the reason we, witches, alway avoid saving seven people at once but I couldn't bear the thought of letting these seven children, whom Kaine risked his life to save, perish like this. So, I cast the spell on all seven of them, which left a significant magical trace in the house. I left the house the year after, deliberately leaving it in an abandoned state so that no one would bother to come there but I was wrong."