In the LN this was more like Horror + Comedy vibes, which makes sense since the Light Novel volume this is from was released on the exact day of Halloween last year.
This is just the "Seven Shadow Chronicles" campaign from the Mobile game. Its actually quite good and contains a lot of information about characters, Shadow Garden and the world we wouldn't get otherwise. I'd recommend reading it if you're a fan of the main series.
They actually did cut the story short a bit but I'm glad it got touched on, its still better in the Light Novel though :c
The 7 Shades actually all have pretty good backstory and this is just the first one.
Well we already know about the Hero of the West, who killed like 3 or 4 of the 7 Sages of Destruction in a 7v1. So yeah, we already knew non-mages can be extremely strong.
The manga version is a little shorter than the LN version and the LN also did pretty well on the broken english / internet banter. There was a lot more text from the other anons in the LN though.