Kant did not have much patience to begin with.
Towards the undead, Kant desired more than anything in his heart to destroy them quickly, from the source.
But the reason why he contracted the defensive line and relied on the castle to defend was because he was afraid of the high-level power hidden within the undead, which was once some relics left behind from the ancient times!
For example, the demons of the abyss that they had seen in the underground of the Senwaya Range.
Or the undead pope.
These were the people Kant was wary of and worried about!
These old fellows, the power of the ancient relics, could still be preserved even after ten thousand years. Even if they were extremely weak, they were still a threat to Kant.
A great threat!
That was why Kant remained vigilant.
The final goal of sending out the Swadian footman was to train the troops.
But there was another hidden goal, and that was to test them!