I lost my boomdagger enhanced by "…of doom". If I get it back, is it still enhanced?
I don't have a rules citation for you, but I've always played - in this game and every similar case I can think of - that cards that enter a pile (like the discard pile) are no longer attached or otherwise related to each other. I think this is standard if for no other reason than it would be annoying to keep track of relationships between cards in a pile. So if you have a way of retrieving your dagger from the discard pile, prior attachments would not come back with it.