If you asked a human immortal general who had experienced the war at Deities' Plain in Motian Realm about Zhang Tie's most powerful trump card, he would definitely say that his most powerful trump card was the huge mallet strike after completely activating his battle god bloodline. Facing his huge tower-sized mallet, even immortal emperors would perish. Of course, it was Zhang Tie's most powerful trump card...
However, if you asked a Taixia knight who had seen the power of Zhang Tie's divine chakra outside the mountain gate of Iron-Dragon Sect in Youzhou Province about the same question, he would definitely say that Zhang Tie's divine chakra was the most powerful trump card; because Zhang Tie had just turned Old Man Taiyi and Grand Master Shenkong into ashes only by slightly rotating his divine chakra. Even the 1,000-odd knights of the three major sects were captured without any resistance.
