"Watch your back!" her sister responded. Bellatrix turned, just in time to see a cutting curse flying her way. She dodged, but not fast enough. The spell cut through the edge of her robes. It was a glancing blow, one that didn’t even break through the robes’ enchantments, but Bellatrix knew her little witch would give her hell for it. Which was more than fair. Had that been a Killing Curse, Bellatrix could well be dead.