A Phoenix's Song

After escaping Azkaban, Theodore Nott attempts to recite a spell that would bring back Lord Voldemort, but in return take the lives of a few. But Nott's spell had gone wrong, and the Dark Lord was not back. What will happen if an incantation gone wrong brings back Fred Weasley, but kills a few of the Weasley kids and Albus Potter? Who would George choose- his twin, or his own son?