Mainly magical power. [Demonic ones. There's also the political power associated with being the King of Bel, but it's essentially power from fear.

Which doesn't help when he normally can command an army.] I also have some political power, when I have to use it. But otherwise, it's mainly my magic.

But out of them, political power is generally the worst. Even a single person, who can't fight or cast a spell, can do a lot with politics.