Expert (5e Feat)
From D&D Wiki
Prerequisites: Ability score applicable to skill must be 13 or higher
You become an expert with the skills of your choice.
- Choose two skills or tools you are proficient with. When you make a check with one of these chosen proficiencies, you may add double your proficiency bonus instead of your normal proficiency bonus.
You may take this feat multiple times but never for the same skill.