What's the point with that quite lackluster story in Endwalker?

[Jandor]

Isn't that the Echo that does that?

The blessing is apparently the echo on steroids.

[Fayt1203]

Isn't that the Echo that does that?

The Echo is a fraction of the power of an ancient, a residual power that normally rests within all life in the Source and its reflections, there is a way to trigger awakening to the Echo which often lead to experience a vision of a star-shower falling from a burning sky. and seeing that we are sunderd we need blessing or the traveler's ward as Venat called it for protection.

Jandor has a simpler term,

The blessing is apparently the echo on steroids.

[dapperfaffer]

The Echo is a fraction of the power of an ancient, a residual power that normally rests within all life in the Source and its reflections, there is a way to trigger awakening to the Echo which often lead to experience a vision of a star-shower falling from a burning sky. and seeing that we are sunderd we need blessing or the traveler's ward as Venat called it for protection.

Jandor has a simpler term,

So then:
Emet-Selch: Yes? Did my lesson provoke thought, giving rise to further questions?

>> Choice 1: Three of you escaped the sundering. But what of those who didn't...?
Emet-Selch: Why, their very beings were divided into fourteen, of course. Yet by our power, we unsundered Ascians may raise up one of their fragments to their original office.
Emet-Selch: Ah, but I suppose this in itself bears explaining. So... the names by which you know us are not, in fact, our names.
Emet-Selch: Be it Elidibus or Igeyorhm, all are titles of office. And when an office is vacated, it may be filled by another.
Emet-Selch: Over the eons, I have overseen several changings of the guard among our sundered brethren.
Emet-Selch: And in such instances, the vacant title ordinarily goes to another fragment of the selfsame soul.
Emet-Selch: While it is by no means impossible to raise up wholly unrelated individuals, 'tis we whose fervent entreaties brought forth Lord Zodiark--whose souls He claimed in the beginning--who make the truest servants.

So then, the WoL is Azem in the consideration that because we were able to merge with Ardbert which lead to clarifying the color of the soul that Emet could see, which is like Azems, that makes the WoL Azems sundered soul. Which is where we get the power of the Echo, and the increased version through the Blessing of Light.