If your DM had you use these icosahedrons for saves... https://mymodernmet.com/roman-20-sided-icosahedron-dice/ https://mymodernmet.com/roman-20-sided-icosahed

If your DM had you use these icosahedrons for saves... https://mymodernmet.com/roman-20-sided-icosahedron-dice/ https://mymodernmet.com/roman-20-sided-icosahedron-dice/ then you really ARE old-school.