[Suzerain of Sheol]

Oh, well, Lion of Judah would fit pretty well there, and sound kind of creepy, in my humble opinion.

Mostly because it makes me think of the poor, abused little girl from Jesus Camp up on a stage proclaiming God's War to a bunch of other children and crying for the dominion of the Lion of Judah over all the wicked Earth...

Yeah....

Edit: Oh, and in Revelation, Christ is described as having a sword extending from his mouth, which is something I never managed to work into this. Maybe you can do something with it.