The requirements list ‘Throne challenge’ and ‘Prestige Argos defeated’, and both boxes are unchecked. I understand the prestige Argos isn’t released yet, but I’ve completed the Calus throne challenge on both normal and Prestige since the ornaments showed up with Benedict, and that box remains unchecked. Is this a known bug?
The descriptions were mixed up. You need to do the gauntlet challenge for the helmet. It's a known issue.