All Legion constructs, including the Fel Hammer, are powered by souls. If we are going to take the command center to Niskara, we are going to need some very powerful souls, indeed! You are a very creative person, <name>. I am certain that you will find a way to get what we need from the right sorts of creatures.
<name>, do you have what Allari asked you to harvest for fuel?
Of course. Like all Legion constructs, the Fel Hammer is powered by souls. You have collected some of the most powerful souls around.
They should be enough to take us anywhere you want to go.