Advanced Mastery Advanced Mastery Badge on completion: Rain Master. Complete lessons in order. Lesson 1: Accuracy Bootcamp Lesson 2: Rare Letters & Combos Lesson 3: Long Words Lesson 4: Mixed Case Text Lesson 5: Numbers + Symbols Mixed Lesson 6: Technical Text Lesson 7: Burst Sprints Lesson 8: Endurance Run Lesson 9: Advanced Final Test