Skill Empowerment

Level: 5

Casting Time: 1 action

Range: Touch

Duration: Concentration, up to 1 hour

Your magic deepens a creature's understanding of its own talent. You touch one willing creature and give it expertise in one skill of your choice; until the spell ends, the creature doubles its proficiency bonus for ability checks it makes that use the chosen skill.

You must choose a skill in which the target is proficient and that isn't already benefiting from an effect, such as Expertise, that doubles its proficiency bonus.

Source: XGE, page 165