"Very scary, I see."
Wizard Calder didn't just say that out loud sarcastically. He was watching the whole thing through his screen. The pecker orcs had a straightforward train of thought. When they were told to do something, they would do it without considering anything else. Yes, even if it meant something crazy like sacrificing thousands of their own kind.
The firewall was pretty much extinguished after a few minutes. Still, some of the heavy fire oil remained. Wizard Calder knew that there was something that he could do with it. He was a calm man. After having fought at the miracle wall for about a century, he had a deep understanding of how the orcs fought their walls. To him, it was only a matter of preparation for the miracle wall to be defended.