The inner workings of the door couldn't have been simpler. The strength of the wind increased with every step, creating a vacuum that both tried to send one flying away while simultaneously ripping their body apart.
While Overseer Eudo had thought that this challenge would be nothing for Ryu to cross through, the bare truth of it all was that it was ironically not so simple for Ryu. The reason for this was simple.
Much of Ryu's combat prowess came from his Chaos Qi, the ability of his Pupils to read and react to those far above him in cultivation, and now the prowess of his lightning flame and soul. But, none of these things were related to the sturdy body one would need to cross this doorway.
That said… Ryu had a something that that would make this task that should have been difficult for him as easy as breathing: two Heavenly Winds.