Talk:Argon Crystal/@comment-193.84.79.49-20160712082214/@comment-27279105-20160712133122

afaik you can unlock void missions from 3-4 different planets, which will give you access to T1-T4 difficulties depending from which planet you unlocked it. if you unlock it from a certain planet (dunno which one, not on my gaming PC right now), you will have access to a line of ~3 missions with a level range of 10-15.