Crystal of Insight

You infuse a gemstone with shimmering arcane energy, transforming it into a Crystal of Insight, an enchanted focus that grants heightened clarity and knowledge to those who gaze into it. For the duration, the crystal provides the following benefits

Mind of the Ages. A creature that holds the crystal for at least 1 minute gains proficiency in one Intelligence-based skill of their choice (Arcana, History, Nature, or Religion) and advantage on related checks for the next 24 hours.

Truth’s Reflection. The crystal faintly glows when a lie is spoken within 10 feet of it. It does not reveal the truth but provides a subtle indication that deception is at play.

Revelations of the Beyond.  Any creature holding the crystal has advantage on all Intelligence, Wisdom, and Charisma checks and saving throws.

Once the spell ends, the crystal crumbles into dust unless the spell is recast before the duration expires.