Expert

You have a knack for learning new things. You gain the following benefits:

• Increase your Strength, Dexterity, Intelligence, Wisdom, Charisma or Constitution score by 1, to a maximum of 20
• Choose one skill in which you have proficiency. You gain expertise with that skill, which means your proficiency bonus is doubled for any ability check you make with it. The skill you choose must be one that isn’t already benefiting from a feature, such as Expertise, that doubles your proficiency bonus.
• This feat can only be taken once