Big Chill's offspring are Ben's Necrofriggian children.
Big Chill's offspring resemble Big Chill, only they are smaller and had larger eyes. They speak through high-pitched purrs and chirps.
Once every 80 years, a Necrofriggian reproduces. Big Chill overtook Ben's personality to carry out the birth process. When Gwen, Kevin and Julie arrived, suspicious that Big Chill would end up like Ghostfreak, they discovered Big Chill was ingesting metal to make a large nest. When Kevin attacked it, it squirted "maggot goo" on him, and several strange blue bubbles floated out of it. They turned out to be eggs, which hatched into 14 Necrofriggian babies. They then flew off to space. According to Kevin, they will feed on solar plasma until they mature. He also mentioned that Necrofriggians only reproduce once every 80 years, making a second batch by Ben unlikely.
Ben 10: Alien Force
- Save the Last Dance (first appearance)
- According to Derrick J. Wyatt, Ken has met Big Chill's offspring.
- The offspring are mentioned occasionally by Big Chill in Ben 10: Omniverse 2 video game, after knocking enemies out, by saying "My babies will finish this fight."
- They are Ben's first canonical children in the Main Timeline.