I love this boss and of course I immediately thought of the novella Pale Horse, Pale Rider when I saw your quote as this rider is definitely pale also, though he doesn't look much like Death.

It's one of my favourites.

No, he doesn't look much like Death- and I spent time thinking about him before the penny dropped.

What's the Mouse King doing there?

I think he's just a devil.

And I believe there's an angel there too- though only its wing is left. I suppose the two of them are having a tussle.

There's something round the devil's neck that puzzles me. Is it a scroll? Did it once carry a text?

Might that be a serpent around the mouse's neck?

It could be.

Oh, this one is *amazing*. I love it. Hell looks like a watch dog, and the figure in the center top does really look like a mouse. Pity the horse is so broken, and that the angel wing is left floating in space by itself.

It's particularly frustrating when the breakages have the effect of rendering the artist's intentions unclear.

My thoughts exactly.

Oh, wow. That is fabulous - Death and Hell, framed by a devouring beast...