User blog comment:FairyRaven/Fairy Tail Chapter 392: You Must Not Forget, Review and Commentary/@comment-7418318-20140711094725/@comment-1359322-20140711101657

Just a random idea.

Silver is actually Deliora who fell in love with Gray's mother and changed his name and appearance into Silver. But 17 years ago, some event triggered Silver into becoming Deliora and he ends up destroying Gray's village. The corpse that Gray saw was a doll Deliora used as a means to become Silver.