Prompt: Write a short story about a man who discovers a magical portal

In his younger days, the man had believed in magic. He had always loved stories and legends, and he had dreamed of discovering a magical portal that would take him to fabulous new worlds. Finally, in his 50s, he had his chance. He found the portal, but it was not what he had expected.

Instead of going to a new world, he found himself in a dark, abandoned factory. There was a strange smell in the air, and the only light came from a single, flickering candle. He walked into a small room and found a large, rusty door. He tried to open it, but it was locked from the other side. He heard something moving inside the room, and he started to back away. Then he saw the creature. It was a giant, hideous bugsnake.