Greater Loregem — an ioun stone of deep violet hue, orbiting the wielder's temple in slow, silent revolution. Elven in origin, ancient beyond reliable record.
Spellbook. The gem functions as a spellbook for its attuned wielder. Spells may be inscribed into and prepared from it as normal.
Truesight. The attuned wielder gains truesight to a range of 30 feet.
Mind Blank. The attuned wielder is permanently under the effect of a Mind Blank spell: they have immunity to Psychic damage and the Charmed condition. The wielder is unaffected by anything that would sense their emotions or alignment, read their thoughts, or magically detect their location. No spell — not even Wish — can gather information about the wielder, observe them remotely, or control their mind.