Overnight
Only after Donner's shout did Dayus realize that there is something odd about the positions of the other four duels.
Two of them are happening ahead of him, while the other two behind him. All four duels combined are forming a square. In each duel, both them opponents were in a locked state within each other's close proximity.
However, within that state the Thor academy members created themselves an advantageous situation.
In the first corner of the square, the thor academy student's back is towards the second duo where the second duel is happening, which is also the second corner of that square. In the second corner, the Thor academy student's back is facing the third corner.
The same with the third corner in which the back of the thor academy student is facing the fourth corner and in the fourth corner where the thor academy student's back is facing the first corner.
As soon as Donner shouted, they all kicked the ground and lunged backwards.