Board Thread:Questions and Answers/@comment-25127187-20150728223619/@comment-25971902-20150730230811

you have to clear the Athensphere raids starting with RC1, until the RC2 Athensphere raid is unlocked, and so on to RC3 and RC4. you get obsidian quartz and plasma fragment from the first RC4 Athensphere raid, one of which you need to make deimos' sphere. then you need to do the second RC4 raid to get the other material. Then go to Randall Sphere forgery to make it.