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

Paul had always been a curious man, and when he was young, he had discovered a portal that took him to different universes. He quickly became addicted to the thrill of exploring new worlds and meeting different aliens.

One day, while exploring a new universe, he stumbled upon a strange portal. After stepping through, he found himself in a strange, dark world. As he began to explore, he discovered that the land was plagued by dark creatures. To make matters worse, the portal was closing rapidly.

With only minutes to spare, Paul fought the creatures and closed the portal before it could completely close. He returned to his own universe, feeling like he had discovered a new and amazing thing.