|This article belongs to the Classic Timeline|
Big Chill's offspring resemble Big Chill, only they are smaller and have larger eyes. They speak through high-pitched purrs and chirps. There are 14 of them. One of them is smaller than the others, and was the last to leave Earth.
In Save the Last Dance, Big Chill's Necrofriggian reproduction cycle overtook Ben's personality and forced him to constantly turn into Big Chill and carry out the birthing process. This included ingesting large amounts of metal and flying off somewhere. When Gwen, Kevin, and Julie became suspicious that Big Chill was developing its own personality, like Ghostfreak, they followed Big Chill after he flew away and discovered Big Chill was constructing a large nest out of the metal. 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.
- Save the Last Dance (first appearance)
- Ken has met Big Chill's offspring.[DJW 1]
- The offspring are mentioned occasionally by Big Chill in Ben 10: Omniverse 2. After knocking enemies out, he sometimes says "My babies can finish this fight."
- They are Ben's first canonical children in the Main Timeline.