On the Vesper Defense Outpost (the third place you win along with another planet) to get to the boss portal it says you have to have three artifacs. I only have two of them. I see one right above me after the room with all the floating alien bug things. Is that a good one to get? If it is, can you tell me how to get it? If it isn't, can you tell me which one to get? Thanks a lot!