Willow's spell to activate the Potentials spreads further than she could have imagined. 200 light years away, and 900 years later, it reaches the Ringworld just as a young Machine People girl needs it the most. This story is 7 years old but I neglected to post it here until now.

Mankind had learned the lesson about hubris and their sins were forgiven them. But now in a universe where Sol never shone, they are forced to learn again the pain of war and feel the touch of absolute terror.