As long as a weakness was exposed, Zhou Tian would definitely be able to find that Black Tortoise, and everything that followed would surely be quite simple.
Indeed, overly relying on one's weapon is not a good thing. However, one cannot deny that the short sword Zhou Tian wielded at the time indeed had capabilities that made it dependant. Not everything could make its owner feel reliant on it, especially for a powerful person like Zhou Tian. For a weapon to evoke such a feeling, besides needing to possess great destructive power, the most important aspect was that it must be effective in most situations. Otherwise, lacking in either aspect, the weapon would be merely a tool to Zhou Tian, and he would not harbor any sentimental attachment, thus he would never develop inappropriate feelings for it.
In the past, the weapon in Zhou Tian's hand had never let him down, and at that moment, when Zhou Tian placed his hope on that weapon, it did not disappoint him either.