While Dubhóg reeled dramatically with her face covered, Valkyrie stepped out from hiding and approached the circle. Skulduggery gave her a little wave. She could have wet her finger and smudged the chalk, but instead she decided to put all those hours of practice to good use. Crouching by the edge of the circle, she put her hand flat on the ground and pushed her magic into the concrete until she was almost part of it, until she was cold and hard just like it was. And then she wrenched her hand to the side and the ground cracked, splitting one of the lines of chalk.