Okay, I have to admit I have no clue what you guys are talking about. I don't recall anyone of our normal cast knowing Spellbreaker's nature beforehand. The Serioli that Vlad visited with in Morollan's company understood its nature, but neither Vlad nor Morollan really got it. Vlad asks if he means that Spellbreaker is a Great Weapon, to which he answers "not yet"; essentially, explaining that there is/was/will be a weapon known as "Remover of Aspects of Divinity". Despite the obvious hint, neither Vlad nor Morollan draws any connections here that I remember. Verra doesn't bother knowing about things that are outside of her sphere of influence. Once Spellbreaker is brought to her attention, she knows instantly what it is and what Great Weapon it's associated with. Vlad clearly does not. In fact, the drama at the conclusion of Issola relies on his ignorance. Maybe it's just differing viewpoints but IMO Verra was the first (well, second if we count our Serioli friend) to know and understand Spellbreaker, not the last.