The Fall of Brekhan
Scrolls are modified version of charms, following similar rules. It takes 30 minutes of work to prepare the scroll to be written on, and must be done immediately before the scroll is written. The supplies for this include small amounts of precious metals and materials gathered in the wild, with rarer materials needed for more powerful spells. The cost for paper and materials is 5 SP per energy used in the spell.
High quality equipment for scroll writing can improve your chance to write the scroll, as well as a high quality workshop.