that part of the dark prophesy might have made it across Aryth with Luthier as part of Ishy's plan to corrupt the karetheon cycle in seanchan. the fact that two ancient 'wrongs' are mentioned that point to seanchan thinking is odd. they returned to take back the lands 'stolen' from artur hawkwing and leash channelers because they 'can't be trusted'. i have a feeling that they may try destroying the tower again.