This or Return to Oz?

I suppose The Black Cauldron. Then again I haven't seen Return to Oz in forever and looking back, I believe I've only seen parts of it.

"Here are beauties which pierce like swords or burn like cold iron"-C.S. Lewis on LotR

Return to Oz. The scene of the headless witch has creeped out countless children.

I love both films. But this is something I think entirely depends on the viewer. Take Return to Oz for example. My mother got nightmares over the wheelers, but I think they're hilarious. I guess my personal thoughts are that both films are equally dark, but that's just me.

I ate a pear. I ate three pears. - Lizzie Borden

Return to Oz is darker. With Black Cauldron, all of the really dark scenes are contained within two ten-minute sections, whereas dark scenes proliferate all the way through Return to Oz.