[good, faithful Link. The voice is welcome, someone Cao Pi has subtly come to trust without knowing...almost anything about him, really. He has funny ears and knows his way around a sword and shield, what's not to like?]

I don't know. But, I can theorize.

[it's like he's been waiting ages for the right moment to theorize]

Some of the information we uncovered over time suggested that the World Eaters consume light. I have wondered, ever since, if killing one would release the light it consumed - if, it does not literally eat the light, convert it to darkness or whatever, but merely stores it. Perhaps what is out there is something like that, light released from the carcass of the consumer.