The detection of the vulnerability point of the heroes is based on a trick and its root is in the powerful magic and data which is appointed the supremacy of a hero in the field of battle. It is beyond everyone ability to achieve vulnerability point of a hero and ordinary warriors are not able to achieve it. The Roc can teach the secrets of championship to the champion and it is the same about Ashil. He knows that the opponent’s hell is uncovered and this puts him to trouble. In Shahnameh (book of kings) the primary element of the victory for heroes is not always a spit, blade and sword, but sometimes the hidden armament in his mind and it is nothing but a trick. It means that trick is the unique factor of the defeat of the enemy. The majority of this masterwork is the story, opinion and thought on the other hand, cheat, trick and magic are the tools of heroes and the opponents. The big privilege of the stories in Shahnameh (book of kings) is that the heroes have beyond knowledge about tools of war and they use it exactly the time that other practices have been tested and they did not result. The result indicates that Ferdosi has used this style more than 50 times in all episodes (mythology, heroic , historical) of Shahnameh (book of kings) whereas the plot and the regular sequence of the events is like that he has not missed the heroic characteristics at all.