In the Saw movies, almost every entry introduced yet more Jigsaw apprentices, to mixed reactions. While most horror villains work alone, Jigsaw beginning the Saw franchise with terminal cancer essentially forced him to seek help to complete his various master plans, as he wasn't always physically healthy enough to execute them. This led to the idea of Jigsaw apprentices, which were used to continue John Kramer's work long after his onscreen death in Saw III.
https://screenrant.com/saw-movies-every-chararacter-working-jigsaw/