Brand of Ignorance

You carve a flaming sigil in the air in front of you, manifesting a burning brand on yourself and up to eight willing creatures and creating a powerful mental ward around you.
While under the effect of this spell, you are immune to magic that allows other creatures to read your thoughts, determine whether you are lying, know your alignment, or know your creature type. Creatures can telepathically communicate with you only if you allow it. Additionally, the brand veils information that which might otherwise be harmful to a mortal mind.