pip3.9 install BeautifulSoup4
for example download all lands
mkdir lands
./archivist.py 'http://gatherer.wizards.com/Pages/Search/Default.aspx?type=+[Land]' lands/
or download all green cards from Urza's Saga
mkdir urzas-saga-green
./archivist.py http://gatherer.wizards.com/Pages/Search/Default.aspx?color=%7C[G]&set=[%22Urza's%20Saga%22] urzas-saga-green/