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

Jeff had always been fascinated by the idea of magic. He had always been a bit of a skeptic, but as he got older, he began to accept the existence of the supernatural. He had always been a skeptic, but one day, while out walking, he found a portal. He stepped through and found himself in a new world. He was shocked to find that this world was full of magic. He was also shocked to find that he was the only person in this world. He quickly realized that he was the only person who could help this world heal from the damage that was done by the evil magician. He set out to do just that.