Chaos Knight's Armlet of Mordiggian

This item can be obtained in genuine quality only from the Lockless Luckbox, which was given out to players who bought certain real-life merchandise from Valve's "Secret Shop" pavilion at Benaroya Hall during The International 2013.

It's possible to craft it in regular quality through the relative recipe Recipe: Chaos Knight's Armlet of Mordiggian.