User blog comment:Miskos3/Fairy Tail Episode 252: Tartaros arc: Gray vs. Silver, Review/@comment-4449950-20150926115915/@comment-4449950-20150926122013

He didn't know. However, I don't see why that would change any of his plans at all. Iirc, and I dunno if I do because I block these painful chapters from my mind, he only decided to have Gray specifically get rid of him when he found out he was alive.