Anyway, let's talk about the general plot of the story!
First, Ryan met 9-year-old Tom when he traveled back in time. Then he exhausted his magic power and became weak because of saving the elf mother tree. He was targeted by greedy people because of the many gems he sold. When Tom was in school, he was robbed and was stabbed to death when he resisted. Because of the companion elf in his body, his magic exploded and traveled through time and space again. When he finally tried to return to the HP world, it was already decades later. At this time, Tom became hating Muggles because of Ryan's death and was at war with Dumbledore...