A common horror situation is to go into the threat’s lair. The decision is made to enter, you follow a winding path, and eventually arrive. No monster yet, but the place is creepy.
Here is a snippet from Harry Potter and the Chamber of Secrets. As with the Coraline snippet, there’s no rushing to the reveal; as Harry goes down the path, a lot of short sentences are used to build the suspense, swapping between observation and reaction.
But the language J.K. Rowling uses in this snippet is more elaborate—‘inject’, ‘straining’, ‘shaking’, ‘tingling’, ‘dreaded’, ‘crept’, ‘entwined’, and ‘glinting’. Nothing about this is ordinary from Harry’s point of view, so the language is vivid to reflect his fear.