Thread:Light.Runner.Explorer/@comment-33264586-20171020191626/@comment-25659393-20171020200038

Hmm, TJ (@tjabbar) another user on here has all the skills mastered so they're all possible to to be mastered. I'm not sure if there is a problem with your account or if you just need to try a few more mastery challenges to see if it can be mastered. Let me know if you still can't master it after you try a few more mastery challenges.