Correct me if I am wrong but I think you are misunderstanding, the sword Blackfyre is the Targaryen sword, its where the Blackfyre's got their name, it is not the sword of the Blackfyres although they were the last to posses it.
That's my point, and the point that (F?)Aegon would have to sell. As long as he vehemently doesn't accept the premise that the sword is anything other than the great Targaryen sword of old, that's what it will be, and he will be reclaiming it in the name of his great ancestors.
The question OP asked was if the sword alone is enough to legitimize him. And it's not. I think that when Dany would come proclaiming he is false dragon, holding Blackfyre sword would actually be a bad PR. Especially in scenario OP thinks would happen
Oh. I guess I was responding to the later comments, not the OP.
No, I don't think having the sword alone would legitimize him. Handled correctly, it could help. Handled poorly it could actually hurt his cause.
Edited by A Man Has Said, 26 June 2013 - 03:57 PM.