The Sun Blades were a schismatic Harrinite holy order that founded the crusader state of the Sun Refuge. This organization was formed by a small group of paladins, originally hailing from the Ersas City States, who traveled through Hellea, Thadria, and the Chaskan states for years gathering more faithful followers and resources. Driven by a belief that the mainline church of Harinna was too complacent in allowing evil to exist in the world, they set out to combat what they saw as the unholy scourge of Tarkuus. After their initial landing on Madisa in Y8925* and their destruction of the few undead around, they rapidly set to work building what would later become Harinna's Hold.
The Sun Blades have been de facto defunct for centuries, having been subsumed into the Sun Refuge.