"Light is the way, and light is mercy. Our type of light is a decree, as we banish the overlords by tearing their hearts! Their destruction is the way towards the light, but there is more, their dead slaves can be revived for good." The queen kept translating.
There was more to this scroll, she continued. "Purify each darkened soul, and then seek its physical host. If you deem it merciful, you can give their souls back! The body, unmoving or resurrected, doesn't have to be your property to accept your help; Long as the soul is reverted (pure), you can chant your decree, pure necromancers!"
This wasn't exactly what they were looking for, but it may be even better. Apparently pure necromancers were the rebels of the old world, and they found the most unique way to fight the feared overlords of that time.
"I think these guys destroyed the old world, credits to them." Audera said, after she picked up the hints between the paragraphs.