Sergeant Skullsplitter was casting the Death school blades on my character instead of himself. That would be great if I was using a Death school student at the time, but I wasn't. He would have helped me take him down faster.
He was obviously confused, because later in the battle he started casting Death blades on my character and immediately casting a second spell, like Death traps or even attacking me during his round! He was taking 2 turns in one round! He was confused and frenzied! If needed, I took a picture of the Death blades circling my Life Wizard. Obviously I didn't put them there.