Solasta: Crown of the Magister

This will unlock after you create 20 scrolls. To create a scroll you will need a recipe, which you can pick up in loot as you're adventuring, or buying from the various vendors around. All recipes you read are for the whole party, not for a particular person so don't stress too much about who is reading the recipe.

In addition to the recipe you also need to know the spell that you want to create a scroll for. So your clerics and your wizards are going to be able to create different scrolls.

Finally you need the components to make the scroll. These you will find in chests, in loot from mobs, and from random events when travelling.

You can make multiple copies of the same scroll for the achievement.