Wizard: Saving the World, Starting as a Witcher

The Witcher world, 1263. On the eve of an age of contempt and chaos, a soul transmigrates into the body of a ten-year-old boy named Ians. He must survive, seek adventure, forge a master-and-student bond with Vesemir, and get swept into the vortex of destiny surrounding the Elder Blood. The fires of war blaze ahead, while conspiracies and ambushes lie in wait behind. From distant shadows comes the howling wind, like skeletal riders streaking across the sky, or a sly demon whispering in his ear. Strange mutations are springing up everywhere. Is another Conjunction of the Spheres about to come? Then, with the art of magic and a witcher's sword in hand, it's time to change the world. This is an adventure story about a witcher. (A Witcher fanfic. The timeline follows the novels, but that won't affect your enjoyment.) (No System. I'm a new author and not very good at setting things up.)