Skill Master

Prerequisite: Level 8+, Skill Expert Feat

You gain the following benefits.

Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 20.

Expertise. Choose one skill in which you have proficiency but lack Expertise. You gain Expertise with that skill.

Mastery. Whenever you make an ability check for a skill in which you have Expertise, you can treat a d20 roll of 9 or lower as a 10.