I have unlocked Dragon's Boon.
However Tactician Erlandson does not sell Dragon Mastery Crystal 1 so I cannot unlock Dragon Forger. Without Crystal 1 it appears I cannot train the mastery track. He does have Crystal 2 in inventory but it is locked until Dragon Forger is done.
According to the Wiki, Erlandson is the man I need.
Anyone have an explanation for this?