"Cartographer's Ink" by Beth Cato was published in Daily Science Fiction on August 24, 2012. The elderly royal cartographer of the kingdom of Qen whose control of magical ink is vital to his kingdom's defense hides the fact that he is crippled by arthritis and unable to perform his vital duties.
Ms. Cato admits in the author's note that it took her years, much advice, and many revisions to get this story right. I am glad she stuck with it. Her system of magic, by which a cartographer uses enchanted ink upon an enchanted map to produce effects in the real world, is unique and interesting. 7 rocket-dragons.