User blog comment:A, Mori/Aura Info Junk/@comment-3126873-20160217015222/@comment-16075172-20160217134245

The second rust is supposed to be iron, it's when he's pretending to be Revelian in the Dr. Sand story

It can be considered a "grand compilation of whatsits", yeah; it includes alternate timeline iterations as well as "Alpha/Main/whatever"