The Cygnus Clan had been pursued for a good reason from the Demon Empire. They had one of the key techniques of cultivation that would maybe allow for the more troublesome bloodlines or physiques to be improved or controlled.
The Akashic Bloodline Physique was rare but its inability to be tamed was an issue no one had been able to solve until Lind figured out a method. It worked but hinged on too much coincidence and groundwork for the Demon Empire to endorse it.
It was part of why the Cygnus clan left as the pressure to cross lines even they did not want to, left them in a dangerous spot politically and literally. The then Emperor would happily start killing clan members to get his way.
It was also why they hid it away on their way to Darkmoor Kingdom. It was simply inviting destruction to have their Clan hide in Darkmoor with the Accords in their possession at the same time until Darkmoor valued them.
