I Love Warhammer 40,000

After doing pointless reading of the new space marine Index, I came up with a space marine force called the Lost Brotherhood. They know nothing of their founding or Primarch, but their records show that they existed at or around M33. Most of their records were lost in brutal fighting against an unknown alien race early on in M33, although a few fragmented pieces did manage to survive. Their oldest record makes reference to someone called "Kelidos Xeruphan", but who this is and why the number XI is associated with him is lost to time. Even their original name and symbol are lost. The chapter's armour is mostly bone coloured, with a bone-gold trim and purple shoulder guards and helmet.