Time to Gather Bones

Now let's get to work. To raise the dead warriors around here, I'll need a brave and agile assistant. Take my Necrosphere. If you see any remains, give me a sign. I'll direct a flow of magic into it, and all the dead nearby will rise from the ground.

That's very odd. Some of the undead refuse to obey. Something is not right...
Perhaps... they are under some kind of influence. Or someone is controlling them.