Harry's previous words completely infuriated Bellatrix. The somewhat unhinged female Death Eater obviously would not tolerate anyone insulting Voldemort, and she frantically fired lethal spells at the spot where Harry and the other two were hiding.
The three quickly exchanged glances and waved their wands simultaneously, causing the surrounding collapsed shelves to fly toward Bellatrix, creating trouble for her.
They were not the main force of this battle; they only needed to help tie down the energy of one or two Death Foxes, creating a greater advantage for the other members of the Order of the Phoenix.
Chapter 1030