This line comes from Team Fortress 2, Valve’s class-based multiplayer shooter released in 2007, and is tied to the Spy’s theatrical personality. Short Spy quotes spread widely through YouTube edits, gameplay compilations and meme soundboards because they are instantly recognizable and easy to time around a visual payoff. “Wanna see a magic trick?” stayed popular because it works beyond TF2, fitting any clip built around deception, a fast switch or a clean surprise. It often appears alongside other goofy ahh sounds in broader meme edits.