I'm a Muggle in the Wizarding World

Traveling into a world where any passerby can cast magic spells, Arthur expressed panic because he was a Muggle who couldn't learn any magic. He prides himself on being cautious and prudent, but accidentally awakens a mysterious power and becomes easily angered. The angrier he gets, the stronger he becomes. He transforms into a reckless man in close combat, capable of overcoming everything he encounters. Hypnosis? Immunity! Punch me! Wind blade technique? Bounce! Give me a slap! Fireball? Eat my martial soul fusion skill, Ace Fire Fist! Let's see how the different-world version of Hulk cuts through the crowd.