Jerry stopped powering the artifact in preparation for his death. Sarah was the first character to use these in the comic. Susan was later revealed to have taught her how to use them; she in turn learned the technique from the French Immortals on her trip to France with Nanase. She is the most proficient with the hammers, being able to use three of them at the same time while carrying a lunch tray and earning the nickname Hammer Queen. Since then, they have been used by Elliot (while in Female Variant 5 form), Amanda, and Gillian (while in human form).