Tanea's Temporary Expert

Using a book on a specific subject as your focus, you become an expert on that subject 1 hour. You gain expertise in the relevant skill checks for the duration. This spell can also grant expertise in the use of a weapon, tool, gaming set, or musical instrument. For instance, a book on the Viol would grant the caster double their proficiency bonus to performance checks while playing the Viol. This spell only works with one expertise at a time.