Book of Blood

While using this Book as a Spell Focus you can’t be targeted by any divination magic or perceived through magical scrying sensors. It adds double its proficiency to Deception and History checks.

While attuned:
You may cast Arcanist's Magic Aura once per long rest.
The book cannot be detected by divination magic.
You may cast Commune once per long rest.
You have +1 to AC and Saving Throws.