Liberatum Necromantica

An eerie green seal gently glows on the cover of
human flesh that adorns this book.
Requires an intelligence score of 12 to use.
After spending several hours with this book,
you become attuned to necromagic items and
gain resistance to necrotic damage types.
Additionally, you learn the nature of how
necromagic works and may be able to identify
strengths and weaknesses of necromagic creatures,
magic, and lairs.