The difficulty of the first level of the maze lay in its dark environment. The darkness shrouding the first level came from magic, and it limited the effectiveness of spells such as the Wand-Lighting Charm.
As long as the Champions could dispel the darkness and get past the various man-made obstacles on the ground, it would not be a problem.
Draco had his own unique understanding of the Wand-Lighting Charm, so he could use this spell directly to dispel the darkness.
According to the Patronus Charm technique Vizet had shared, the cold and darkness beneath the lake could both be used to trigger the "survival instinct";
Cedric and Harry were using precisely this principle, letting the "survival instinct" maintain the Patronus Charm and thereby achieve the goal of dispelling the darkness.
It was just that the environment at the bottom of the lake was more extreme, so triggering the "survival instinct" there was much easier;
Inside the maze, Cedric and Harry had to split their attention to maintain the "survival instinct" in order to keep the Patronus Charm continuously effective;
They had actually considered directly summoning a Corporeal Patronus and letting the Corporeal Patronus accompany them at their side;
But doing that would drain even more energy, so it was not as good as this method of using the "survival instinct" to maintain the Patronus Charm.
To avoid giving the other Champions a chance to cheat, Ludo Bagman simply stopped talking. He stood at the edge of the viewing platform and occasionally looked down, waiting for all the Champions to enter the maze.
He also kept an eye on the Champions' movements in the curtain. Reporting their progress was still something he could do. "The Hogwarts Champions are moving at an astonishing speed!"
"The Beauxbatons Champions haven't even entered the