In response to the Excalibur thing, it doesn't tell everyone who sees it what it is. It's the Grail that informs all the Servants and Masters that saw it of the thing's stats once it has been IDed. Also, Saber stopped using Invisible Air once Excalibur was revealed, unless she has a prana supply problem. If I recall correctly, it wasn't even truly one of her Noble Phantasms, but one provided by the Grail to hide the identity of Excalibur, as it is so unique that it would be identified immediately if anyone saw it. Plus, I get the impression that Saber simply doesn't like using it, as she seems to prefer confronting her enemies head on, without even the slightest hint of deception or trickery.
-----
Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber." --Krityan Elder, Tales of Vesperia.
-----
Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber." --Krityan Elder, Tales of Vesperia.