This brings up a good point though. DM said we make it to the surface without issue, so do we have the opportunity to have this discussion before we leave the tomb, or do we get to the surface and still retain our memories? Schurke and Profit have both suspected that Harrl was always in possession of City Cleaver from the start, but of course, would have no idea that it was encased in anti-magic stone.
Maybe we should try to document this info somehow.