Aron Steele was no longer able to hide in the horde of shadows. In fact, he fell into a great disadvantage in the middle of the fight. He was able to kill some of the remaining Champions through the use of the environment and the minions of the darkness.
But right as he was about to kill the last one, the Champion struck back, and the Commander suddenly rushed in.
The blood of the Champions he slew had managed to stick on him and was used by the Vampire Commander as a means to find Aron.
It all happened so fast, and Aron relied on his Path of Combat to evade and avoid the attacks of the Vampire Commander and keep himself alive.
Aron could evade and kill the Champion, but his right arm and left arm were sliced off by the Commander.