Board Thread:News and Announcements/@comment-50.90.129.119-20130605160512/@comment-98.85.141.202-20130707183540

You need two nemesis armors, and you'll need the dark prince's chest or a limited time chest, which costs 20 or 30 gems, and even that will only give you a small chance. Just go for the legendary armors; it's really hard to get starmetal.