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Maybe they are talking about people who already have it unlocked on other characters or you can use those weapons as soon as you unlock the first trait in the elite.
They specifically say that you can equip those weapons as as soon as you unlock Weaponmaster Training in SotO (whatever unlocking means) without training a (any?) Elite Specialization.
I don’t know whether this means that you do not even need to own the corresponding Expansion. I think it’s really weird.
They explicitly say that you don’t need other expansions, if you only want to play with those weapons. But it will NOT unlock the elite specialization. So: you want a long bow core guardian with only core game and new expansion? You can.
Hmm. Maybe that is exactly what it means and they just get rid of all requirements except having the build traits when you play with a class and unlock the Weaponmaster training.
Dunno if that will be accountwide like a mastery or if you have to play through it with every character. I think it is the former but the way they made the jade bot im not sure.