The expression on Duke Bard's face was awful. If the first time they injured a knight was to boost morale, then the second time when they butchered the injured enemies just meant that this was what Saleen's soldiers have been trained to do.
A typical army would not do this because it would incite the enemy to fight to the death.
Saleen's army clearly did not care about this. They even had soldiers that specifically carried out such a role. Their actions were very much in-sync, which meant that they have been trained for this. Without the appropriate weapons, it would not be easy to pierce through the armors of the heavy-armored knights and kill them.
"Should we stop them!" Duke Bard asked Tiffany.
"Why should we?" Tiffany was confused and replied with another question.
Duke Bard was speechless. Tiffany was a grade-8 sorcerer so she had zero pity for these soldiers. It was foolish to ask a mage whether or not a prisoner should be killed.