The story describes the two gods, brothers, with highly different abilities (one able to see anything, another to do anything). Most of the time they live friendly life, co-operating with each other, supplementing powers and none of the two being superior. When together, they are also strong enough to stay away and neutral from the endless clashes and conflicts between other goods, each of these everyone seeking the dominance over the Universe.
Further the story tells there was a conflict between these two gods in the past, that they damaged each other significantly, the all-seeing Rhynn losing the eye and almighty Kwll losing the hand. They suffered for the long time for breaking they union in this condition. Only after the long time the two gods managed to get the lost hand and eye back, and after that were no longer willing to fight, restoring the former friendship.
This story appears to me somewhat different and emotionally stronger than numerous other events described in *Swords Trilogy", and I started to think maybe it is based on some real myth that has been known for the author.
Greek Morai co-operate with they different abilities and while kind of aside and neutral (Zeus rules the world) Morai are actually acting over all other gods. But anyway they are three, and sisters. Could it be that some other story exists?