Clear Mind

You harden your mana into a semi-sentient crystal brain that links itself to the mind of a willing creature you touch. The crystal brain hovers around the creature's head in a way similar to an Ioun Stone.

For the duration of the spell, the creature's mental capacities are shared and enhanced by the brain. They have advantage on Intelligence ability checks and their Intelligence score cannot be lower than 16 and the creature learns Common if they did not know it already.

In addition, the brain can handle some mental processing without the creature's assistance. Once per turn, the creature may use the Crystal Brain's mental capacities to make an Arcana, History, Investigation, Nature, or Religion check as a free action.