This means finishing Normal and Nightmare. To get a Tome of Absolution, you will need to first be in Hell difficulty. So why didn't we just start with it? Well, because getting your hands on a Tome of Absolution requires quite the grind. Technically, you can farm as many of these items, called Tome of Absolution, as you wish. There's an item in Diablo 2 Resurrected that allows you to reset your skills as well as stats. How to get a Tome of Absolution in Diablo 2 Resurrected