Booming voice

As the Death Knight had been glaring at the undead around it, it was suddenly hit with a fireball that came out of nowhere.

Then after that, there were several more fireballs that hit the Death Knight at the same time.

These fireballs all came from different directions, so they bombarded the Death Knight from all around it.

The Death Knight seemed like it had been completely caught off guard by these fireballs. It didn't raise its sword to block the fireballs that came afterwards, so it was hit head on with these fireballs.

However, it was better to say that it wasn't able to do that.

It had found that it had suddenly froze.

It was as if there was something that was restraining it with the way that it couldn't move its arm. 

So in the end, all that the Death Knight could do was let those fireballs hit it.