La-Blaire's frustrated roar sounded from behind Dave like the explosion of a long overdue volcano. Dave couldn't help but chuckle, it was only a fool's errand to fight that which one knew he couldn't beat.
Dave would simply ignore the Chosen One and escape. He didn't need to kill him right now, he could try some other time with the help of his friends, or when he had the upper hand and level.
The Draugr kept running, he wanted to make sure that the Chosen One had fully focused on chasing him, and he had to assure that when he was going to make a break for it and escape for real, his undead army would be too far away for La-Blaire to go back to and hunt.
Dave didn't doubt the ability of his Undead to halt or at least slow down La-Blaire's movement if the Chosen One decides to ignore Dave and return to assault them. Many Death Knights would die to the Chosen One, but the majority of the army would still march ahead and destroy the cities of Qin.