User blog comment:GotMilk5101520/How will the Tartarus Arc Part 4 will end?/@comment-4700320-20140708120557

Silver isn't Deliora but thinks he is because Keith is controlling/brainwashing him. Deliora simply took Silver's body to Tartaros for obvious reasons (that he doesn't have to use his true form all the time), Keith revived Silver but then Deliora really died with Ur's sacrifice leaving Silver at Tartaros. In this, Silver was a demon slayer before, which could be since that one panel showing Papa!Silver had him say "Hahaha, become strong, Gray" indicating that they fought against each other but Gray lost because Silver was stronger. Keith kept Silver in control for personal reasons. This is just speculation but Keith's one attack was called "The malefic..." then Gray ended the attack by attacking Keith. And it looked like mind-controlling waves in the background, take a look on it again. "Malefic" can be a planet but if it's an adjective, it often means having or exerting a malignant influence. I don't know, I just think that Keith knows too much about Gray and Silver's relationship and past. I like theorizing this certain issue!! ^-^