After witnessing the style of the Tower of Descent on Dragon Island, Hilia found this heretical group even more detestable than the Deep Sea Mutual Aid Association, though slightly less than the Polar Blood Alliance that froze an entire town.
But they're all equally damnable.
The Tower of Descent is a heretical sect. They took on the mess that Hilia and the Blue Dragon officials threw out, merely to prove themselves and absorb these rescuing mercenaries as their members.
The Dragon Island incident had ended, and if they could still plot against the Blue Dragon Empire after losing two generals, then Hilia would give them a thumbs up.
No matter what they intended to do, since they encountered them, there was no reason to let them go.
Hilia did not kill them directly.
She chose to use the Purification Skill to dispel the corruption on them first, to see if they were innocents who had been misled, or hopeless heretics.
