what did they call the mummy shaped figure that worked in the afterlife's fields for the mummy?
http://www.carlos.emory.edu/ODYSSEY/EGYPT/shabtis.html
The mummy shaped figure that worked in the afterlife's fields for the mummy is called a shabti. Shabtis were small figurines that were placed in the tombs of ancient Egyptians to assist the deceased in the afterlife. These figurines were believed to come to life and perform tasks on behalf of the deceased person, especially manual labor in the fields of the afterlife. The word "shabti" comes from the ancient Egyptian word "wsheb" which means "answer" or "respond".
If you're looking for more information about shabtis in ancient Egyptian culture, you can visit the link you provided (http://www.carlos.emory.edu/ODYSSEY/EGYPT/shabtis.html) which provides detailed information about their purpose, significance, and different types of shabtis found in tombs.