A significant spoiler is related to the final bosses or major antagonists in the light novel. Without giving too much away, there are some unexpected twists regarding who they are and what their motives are. There are also some romantic undertones that develop further than one might initially expect between certain characters in the story.
If you learn about the spoilers in the Konosuba light novel, it could change your perspective while reading. Say you find out about a plot twist early on. It might make you read the build - up to that twist differently, noticing small hints that you might have otherwise missed. However, it can also take away the element of surprise, which is an important part of the story - telling experience.
The Konosuba light novel is not a fanfic. It has its own unique plot, characters, and world-building developed by the author's imagination and creativity.
The Konosuba light novel is good. It has a charming mix of fantasy elements and comedic situations that make it highly enjoyable. The character development is also well done.