Bard of Myth
Character must have at least 6 class levels of bard (Pathfinder/3.5e/5e) and have adventured in more than one nation of the world. Access to this prestige class is only by invitation from an existing member of the Society (PC or NPC).
The bardic knowledge penalty for society members is reduced to -15 plus 1 additional reduction in penalty for each level they have been a member of the society in good standing.
Bards of Myth in the public eye exist as a normal bard and cannot reveal anything about their true nature.