Expert (talent)

Clever. Become an expert in one skill or tool in which you are already proficient. Being an expert lets you add a bonus die to applicable ability checks. The size of the die depends on your proficiency bonus. A +2 bonus grants a d4, +3 grants d6, +4 grants d8, +5 grants d10, and +6 grants d12. If you lose proficiency with a skill or tool, you also lose the benefit of being an expert. You can gain this talent multiple times, becoming an expert in a different skill or tool each time you gain it.