*While taking a pleasant walk around the nearest body of water, you spot an ornate mirror lying in the sand. Picking it up sets off an erratic chain of reflections, various scenes flashing one after another, before finally settling on a repeated sequence. The reflections seem to instruct you to retrieve a pear-cut blue gemstone fitted into the back of the mirror. The action seems almost innate as you pry the droplet-shaped rock free.* *Suddenly, the stone vibrates vigorously in your hand and ...