User blog comment:KillRoy231/How will the season end?/@comment-1031724-20180103205910/@comment-31647781-20180104115012

It's most likely the case, because Cass had an angel blade but chose to stab him instead. None of TFW were thinking about removing his grace to neutralise him, and even Lucifer (without knowledge of the alternate universe) said there was no way to beat  him without the Cage. They have plenty of angel blades. So it's most likely an archangel blade, but I don't think it's been said.