(Spoilers)So did the Scions see it?

[Vulcwen]

Alternatively, it may be that Elidibus is simply lying. We know the Ascians are capable of granting the Echo one way or another since the Sahagin priest had it, and so the whole starshower affair might just be a charade. Like, I genuinely don't think this is a likely explanation--it would be cheap to bring the starshower back as a plot point and then reveal it as a lie--but it's always worth keeping in mind that Ascians use deception as a tool liberally.

I'm going to assume everything he claimed about Hydealyn are lies or half-truths at best, including the assumptions Urianger came up with. No better way to lie than to just confirm mistakes others come up with. Confirmation bias will almost guarantee they'll believe it.

[KalinOrthos]

Not sure if it's been stated, but could the other Scions not have recieved the Echo because their "bodies" in the First aren't their true bodies, and their soul or mind or aether may be split between the First and Source, thus making them unable to awaken the Echo?

[QT_Melon]

Not sure if it's been stated, but could the other Scions not have recieved the Echo because their "bodies" in the First aren't their true bodies, and their soul or mind or aether may be split between the First and Source, thus making them unable to awaken the Echo?

Many times.

It's also been countered at least 2 of them saw the starshower in 1.0 so....