This cube is my latest creation and is intended to be drafted with two players and has four primary archetypes. The primary theme is "Hidden information" and provides tools to do plenty of things at instant speed and manipulate what information people do/do not know about.
UG Morph
UW foretell
UB Ninjutsu
UR cycling
There's a lot of potential for mono-blue control and 5c Mastery decks as well.