Renux, an epic mob made to spawn in Steemfont mountins, drops some ravenscale(i heard 3 peices once as well as two peices) as well as a dagger and a note, both are used for epic
Not sure what it is on....look up the ragebringer epic becuase its part of that. I remember reading about the arms while checking the epic out. Got mine for 150pp Good luck.