Cygnus will take the Lies domain soon after he comes to be, realizing that it is impossible to make others jump through the hoops you designate without a few well timed bluffs.
The Lies domain gives the gods who possess it increased abilities at bluffing and convincing other gods that what is not true actually is. Normally, gods of greater power can see through attempts at lying, but the power of the Lies domain adds to the charisma of the gods who possess it, letting them fool greater gods as long as their lies are believable. Creatures that specialize in tearing opposing forces apart from the inside or in deceiving others tend to be created by gods who possess the Lies domain.
Any character who places an unusual focus on the Bluff skill might worship a god of Lies.