It was actually just an in-game virtual helm. The legendary MASK OF THE WYRM SLAYER! Whatever that is - looking at the promo card with it on there now.
Anyone else pic this up? For $20 it's been a lot of fun. Hardest part was getting over the click-to-move dynamic that's so natural after D3. Got into a few good groups and it was crazy old school action. It has its flaws for sure, but again, for $20, it's a steal.