Erik and Sven's unit started their march towards King Asmund's camp despite being outnumbered more than 10 to 1, it was odds that were nowhere near their favor but they had to do this to prevent King Asmund's time to figure out their ploy.
They needed to engage them even if they knew this might be the last time that they fought as death looked to be in their near future.
"Sir Oskar! The camp is empty," A scout reported and Sven noticed that they were on a field that looked to be tampered with, prompting him to signal for his advancing unit to stop.
Erik, on the other hand, kept advancing. Sven was surprised that he was unmoved by such an injury despite receiving it that day.
An injury on that scale usually is enough to put people out of commission but it was like a scratch to Erik, and now he had an army that believed that they were led by a god.
A delusion he knew about but decided to go along with because of the effect it had, even Erik didn't believe himself to be a god.