https://www.foldableflight.com/planes/mystic
Started watching the video not planning on actually making it, saw that it is done with A4 paper and grabbed a random sheet at my desk to follow along. The pocket felt like a nice "a-ha!" moment. As someone who only knew the "naive" way to make paper airplanes from A4 paper, this is the best performing and prettiest paper airplane I've made in my life! It almost feels like it's not real how smoothly it stays straight in the air compared to all my paper airplanes in childhood.
Edit: Tried making the flapping wings AeroDactyl but it didn't work out :( wasn't aerodynamic and didn't flap its wings just went straight to the ground
Edit 2: Tried making the Jetstream (another 1 minute plane) and it came out well! Mine is INCREDIBLY asymmetrical and still flies better than any other plane I've made other than the Mystic!