The MTL said that you need to explore the dream world more to gain power, maybe you need more LV.?
Edited: Lv. and Skills don't seem to be the checks either, I maxed out all the skill trees and still stuck.
Used alot of damn eye power for this one.
(MTL'd with MTool for the game so forgive me if you're not sure what the names are ) :c
Anyways, at the 2nd floor of the nightmare mission building (the one where you pass the platinum eggs thingy), there's a dream fragment to the right side of the room. It's a little hard to see but its a yellow blip thingy compared to the blue blips.
After getting the dream fragment, go to the fortune teller and it'll unlock a new area/dream.