Several hours passed before the Fler siblings had expelled the imprints of multiple soul pacts from their souls.
It was an arduous task, and it was only then that Jason realised that the Drake clan used several soul pacts in order to ensure the slave's obedience!
This was something he hadn't known beforehand, so he was astonished about it.
Jason found this to be an extremely cunning tactic, but it perfectly suited the Drake clan's behavior.
Nevertheless, it didn't really bother Jason anymore after the Fler siblings had been freed of the soul pacts that enslaved them.
Their souls had been much weaker than the God's Children which made it easier for Jason to control his two new, temporary soulbonds, forcing them to expel their soul pacts in a slow manner.
However, at the same time, he had to be careful so that he wouldn't accidentally injure their souls, which would be devastating.