Zhang Tie chose spears as they were the sharpest and most effective weapon for him to handle demon battle spirits.
To be honest, if anyone among the knights entering the Heavens Ball really wanted to use these spears, Zhang Tie could give them to him if that knight asked him politely. Because the pass of demon battle-spirits was just the appetizer of this competition, Zhang Tie could handle them even in other means. However, this knight was very rude and wanted to rob it away from Zhang Tie's hands. Zhang Tie hated such kind of a person the most.
Zhang Tie could be persuaded by reason but not be cowed by force. At the sight of that hand stretching out towards his spear container, Zhang Tie immediately punched towards him.