Dream Force is one of the two forms of mystical energies that practitioners of both arcane and divine magic meld with the other form of energy, Life Force, to cast their spells.
Dream Force is a form of magical energy that is abundant in the Outer Planes, but does not naturally occur on Adnati. Some Dream Force seeps into the Prime Material Plane, but extra-planar beings — particularly deities — can also transmit the energy to Adnati as well.