Board Thread:Questions and Answers/@comment-24146651-20140326070317/@comment-5754239-20140329184450

Mastery was a new feature (as Lamiah has said) that automatically unlocks at the beginning of the game. I don't remember exactly when the player is notified of it, but I assume that it starts as soon as the first production building, the Bakery, is unlocked. ~ironwestie (talk) 18:44, March 29, 2014 (UTC)