Necromancy

Blind the Readers of This Tome

2nd level Necromancy (Ritual)
Casting Time: 1 Minute
Range: Touch
Components: V, S, M (Incense and a book.)
Duration: Until dispelled or triggered

Light incense upon a book when you cast this spell. When a creature attempts to read the contents of the book, or attempts to cast a spell that lets them do so, it must make a Constituion defence check vs your necromancy skill. On a failure, they will be blinded for 1d6 days time.

After one creature is cursed in this manner, the book is no longer protected.