The cold water was already at Rex's ankles. It poured in from the rubble like a broken dam, a dark, muddy flood filling the old basement. "Rex, we have to hurry!" Luna cried, She was filled with fear. She was standing on a broken desk with Clara, trying to stay out of the frigid water. Rex shone his phone light around the room. The main exit was a pile of stone and smoke. There was no other door, just solid, century-old walls. "We can't call for help," Rex muttered, "The blast was muffled down here. No one heard it." The water was now at his calves. Clara whimpered, clinging to her sister. Julian said that he taught me how to build, but he really taught me how to destroy. Every structure has a weak point. Every great building has a secret shortcut or a rotten floorboard. This isn't a

