After defeating Gaja in the arena, Atreus made his way to the Pavilion of the Fenrirborne Tribe. As he sat down to rest, many spectators believed that the battle had been won with a decisive move.
However, what they didn't know was that Kahn had barely used 30% of his strength throughout the entire fight.
By physical stats alone, Kahn was already comparable to a 6th stage saint. He used the battle as a test of his skills, pushing himself to see how long he could last without relying on his other abilities and combat techniques.
Despite his formidable power, Kahn refrained from using any of the five combat techniques taught by Romulus. He repressed his strength during the entire fight, concealing his true potential.
Reference Art for the Pandakin warrior in chapter comments. Check it out.