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

Mike was always a bit of a skeptic, but when he found a portal hidden in the attic of his old house, he wasn’t about to pass up the opportunity. After activating the portal with a old Bible, Mike found himself transported to a completely new world. He was immediately attacked by a group of monsters, but after defeating them he discovered he was in the middle of a battle between two armies. After making his way through the fight and discovering the true mastermind behind the battle, Mike was able to return home with a new-found respect for the magical world.