In the manga, this episode covers ch 127, although there are some few panels in ch 128. It's nice to show more of the ancient city of Amrita with an added small backstory of how it was established, the manga doesn't show more of it. It even showed where Amrita was based from and it was indeed even more beautiful. The art and animation was top notch in this episode, if I were to compare it to the manga, I would rather watch this anime because of the small but important details added. The only small thing that bothered me was the golem in this anime, it looked weak in comparison to the manga version 😅
P.S. I really should continue from where I left off in the LN, but because the adaptation is pretty good, I don't really feel motivated to read it.