User blog comment:Miskos3/Fairy Tail 522 & 523: Gray's Trump Card & Is Destiny Burning, Review/@comment-112.200.200.192-20170219091516/@comment-112.200.200.192-20170220100824

But I was wondering, if Gray had acquired Lost Attribute during his Avatar period, could it be a form of Black Art making it a Lost Magic? Well, I could go with this definition since Lost Attribute was just immediately introduced as a trump card and sorts without a proper guide on how Gray got it.