Talk:Mirage/Prime/@comment-181.231.102.60-20171202001513/@comment-17703786-20171206000311

" Zephyr was based off the Oxium Ospreys with that "new alloy" that was supposedly "Corpus made" (Clearly changed to be Orokin and I didn't pay enough attention, my bad.)" 

The Oxium Ospreys are Corpus made yes, but Oxium itself has always been an Orokin alloy. Here's the description from the Operation Oxium Espionage event where it was introduced:

Weeks ago we received intel about a Corpus raid on a little-known independent research facility near Eris. The Corpus made off with a scientific jackpot, the formulation of a rediscovered experimental Orokin alloy called Oxium. This lighter than air alloy has already been deployed in a new drone dubbed the Oxium Osprey which forgoes its support role in favor of dynamic attacks.

And of course, the fact that you could actually grab Oxium from the Orokin Void.