The Circle took up places around the edge of the Ritual Chamber and draw their wands. They began muttering lowly and, for a moment, Hermione was confused ... until she realised they weren't muttering at all ... they were chanting. Their words were too low for Hermione to make out and, in any case, she got the distinct impression that they weren't speaking English. Slowly, the chanting grew louder and louder, until they were all in sync like a well-practiced chorus. Then, each wizard raised his wand and shot out a glowing beam of white light, which all met at the apex above the plinth at the circle's centre.