The words the Matriarch spoke were the last piece of the puzzle that Theron needed to grasp.
He was wondering what Patriarch Nightingale had been planning out this entire time, and how it related to Lyrah.
Suddenly, everything made sense. In fact, from what it seemed, Patriarch Nightingale had probably been the one to set Lyrah up with the current Patriarch of the Umbra, orchestrating Lyrah's existence and even her path to becoming a disciple of the Nightingale Sect.
In fact, he had probably purposely slowed Lyrah's cultivation, taking her soul not just as a matter of control, but so as to weaken the Umbra Clan's wariness of her as well.
If Lyrah had her complete soul, she would have long reached the Dome of Heaven Realm, and such a person would be too much of a threat for the wives of Patriarch Umbra to ignore. If Lyrah ended up dying too early, it would be a huge detriment to Patriarch Nightingale.
