Bloodless
Karlun provided a unifier for the clans and a way to establish a "royal" bloodline, which promptly intermingled with the most prestigious of the existing bloodlines, the foundation for the Viamontian obsession with lineage and descent. The Viamontians' emphasis on blood and lineage is why they refer to the other nations of Ispar as the "Bloodless," those not benefiting from the mythical blood of Karlun.