Seeing Damian form a Fire Sword, the mercenary was impressed by Damian's skills in terms of wielding energy and condensing Fire Energy into a solid weapon, which is very difficult to do, especially at the speed that Damian did it at.
However, the mercenary was also more confident as he was great at close combat and fighting with a sabre, making him believe that a close combat fight against a mere rank 5 cultivator would be easy.
Little did he know, Damian, one of the few prodigies of the new generation as well as the Copy Mage, was very capable despite his cultivation level.
His physical power alone would allow him to match a rank 6 cultivator.
Matched with his skill, combat prowess, abilities and harmony with his Internal Cultivation, he could rival ordinary rank 7 cultivators and maybe even rank 8 cultivators if he pushed himself to his limits.