Su Chengyu pushed his mana to the extreme, while Lee Longqing, backed by the Seven Kills Sword and its technique, had enough combat power to rival a Half-Step Martial King. Particularly, the Sword Qi of Seven Kills contained blood-thirsty aggressiveness that could capture the soul.
If it were a martial artist of the same rank facing such interference, their strength would naturally be affected, making it difficult to exert their full strength.
However, Su Chengyu was a cultivator, with the strength of his divine sense far surpassing that of martial artists on the same level, and his Dao Heart was also very stable. Therefore, the blood-thirsty aggressiveness of the Seven Kills Sword had no effect on him, so Lee Longqing did not gain the upper hand on the field.