Skill Empowerment

From Xanathar's Guide to Everything, page 165.

Description
5th-level transmutation


 * Casting Time: 1 action
 * Range: Touch
 * Components: V, S
 * 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.

Learned By

 * Classes: Artificer, Bard, Sorcerer, Wizard
 * Subclasses: Sorcerer (Clockwork Soul)