The difficulty of the first level of the maze lay in its dark environment. The darkness shrouding the first level was magical in nature and limited the effectiveness of spells such as the Illumination Spell.
As long as the Champions could dispel the darkness and get past the various man-made obstacles on the ground, there would be no problem.
Draco had his own unique understanding of the Illumination Spell, allowing him to use it directly to dispel the darkness.
According to the Patronus Charm techniques Wizet had shared, the cold and darkness beneath the lake could both be used to trigger the "survival instinct";
Cedric and Harry had used that very principle, relying on their "survival instinct" to sustain the Patronus Charm and thus dispel the darkness.
The environment at the bottom of the lake was more extreme, so triggering the "survival instinct" was much easier there;
Inside the maze, Cedric and Harry needed to divide their attention to maintain that "survival instinct" in order to keep the Patronus Charm continuously active;
They had actually considered summoning corporeal Patronuses directly and having them remain by their sides;
But that would consume even more of their focus, making it inferior to using their "survival instinct" to sustain the Patronus Charm.
To avoid giving the other Champions an opportunity to cheat, Ludo Bagman simply stopped speaking. He stood at the edge of the viewing platform, occasionally glancing down as he waited for all the Champions to enter the maze.
He also kept an eye on the Champions' movements within the curtain. He could still report their progress. "The Hogwarts Champions are moving at an astonishing pace!"
"Before the Beauxbatons Champions have even entered the maze, the Hogwarts Champions have already found the exit and successfully reached the maze's second level!"
It was