Echo and Blessing of light, post endwalker retcon

[MikkoAkure]

The Ancients all possessed abilities we associate with the Echo, but it wasn't what provided protection from tempering. Instead, that was a "Traveler's Ward" woven by Venat for when she acted as the Azem and left Amaurot. It looks like the Travelers' Ward also went along for the ride when copied from Krile to Zenos, lol.

I was under the impression the the “Blessing” was only something the WoL had so I’m confused where that leaves Krile, Fordola, Zenos, Misija, Arenvald, Ysayle, Unukulhai, and Mikoto, who all have been shown to be immune to tempering.

I'd call it a "traditional" retcon more than anything else because there is no progression of knowledge to show that the Scions have been enlightened. They start using the new term immediately in Endwalker from the get-go with no prior exposition or explanation.