Used to augment Reisenjima armor/weapons with additional slots and augments not normally available to that armor type. For example: crit dmg/rate on merlinic, or Treasure hunter+2 augments. Trade one dark matter + item you wish to augment to Oseem. Augments seem as random, if not more than before since you are unable to pick a path to augment with, everything is chosen at random.
Considering obtaining these means you must have at least 3ppl to enter vagary in all 3 zones and kill 5NM's, it's super awesome when you get PET:STP+5 on your blm head piece! Literally gotten crap pet augments on about 80% of my tries. And poop-1 on the other 20%