Kiel lost his connection with one of the Demon Kings and was in disbelief that a human could kill one. He was on his way to a town, to take human souls and use their bodies as demons' vessels. He immediately ordered his army to go back and to assist the others that went to the Mayne Castle.
"Arandil, that man is actually strong enough to kill a Demon King. I'll take his life..." Kiel's eyes glowed bright red as the demons spread their wings and were ready to follow him.
The moment Kiel flew, all the demons followed him, unlike the other forces, Kiel only led the demons, not the possessed.
At the same time at the Mayne Castle, Arandil and his disciples fought the whole demon army. The soldiers watched as those four overpowered more than a thousand enemies. They knew that the demons were no match for Arandil and the others the moment the Demon King was killed by Arandil's hand.
