Tang Shaoyang thought about what Valky said, then he realized that might be the doom for all demons. First of all, the player would not take the demon's side for sure if they knew the demon had been weakened to such an extent by him. Second, the Artamao Kingdom would become an easy target for The Union and The Caracius Kingdom. With or without players, the demon would lose the war. He had broken the balance between the three forces by taking down this fortress and also the Demon Commander.
Valky took her chance when she noticed Tang Shaoyang hesitated, "What if I give what you want, then you leave the Artamao Kingdom alone. The Artamao Kingdom will provide you access to the thirteenth floor without paying, but you must stop your attack against us!"