User blog comment:FairyRaven/Fairy Tail Chapter 390: The Story of a Boy, Review and Commentary/@comment-7418318-20140627093953/@comment-25009609-20140627104333

Wait. I think I understand your question incorrectly. I guess Deliora choosing the body of Silver is purely coincidence. Or, I guess Mashima would tell us how Deliora found out about Silver in the next chapters.