Unfortunately, now that Zhou Tian has come for him, there is no possibility that he will let him go easily. Thus, unless he can defeat Zhou Tian, it is inevitable that he will be taken down by Zhou Tian today.
To defeat Zhou Tian, even that Ancient Powerful Being, no matter how confident, would lose all assurance of self-preservation upon recalling Zhou Tian's past performances. Facing Zhou Tian in combat, the Ancient Powerful Being knew deep down he surely would not be the opponent.
In such a case, should a conflict with Zhou Tian truly arise, the Ancient Powerful Being was aware that it would be more likely for him to face doom than fortune. And the treasures he had been collecting would naturally end up in the hands of Zhou Tian.
Given the situation at that time, the most advantageous move for the Ancient Powerful Being would have been to either surrender to Zhou Tian directly or destroy his collection and then fight Zhou Tian to the death.