The twin swords, Jiang and Ye, were present in the enemy side. They were the two swordsmen that have swords that can emit powerful energy and have an exponential effect when they are on the same side. They only did a skill together and it was already powerful which means that they have become even stronger compared to when they were at the Pandelympics.
Not only are Jiang and Ye become stronger, but they were also the chosen blessed warriors of the Distorted God Apophis. They are the top contributors for those that are on the side of the Distorted God Apophis. They knew that they must kill Cairo so that their allies can go forward.
Cairo himself is maintaining the sand soldiers and the sand soldiers will vanish if he dies. Cairo also knows this which is why he is making sure that he is at the back of the line and maintaining everything. He thought that no one would notice this but there are people with keen senses of sight that have been blessed by Distorted God Apophis.