Spike is trying not to muster up any sympathy for Discord. Discord warped the Elements themselves, changing most of the Bearers permanently into twisted versions of themselves and forcing the pony who raised Spike, Twilight Sparkle, to change herself into something cruel and cold. He killed Discord for doing this, took a sledgehammer to his statue, but Discord came back. Now Spike is trying to remind himself that he has no sympathy for Discord at all as Twilight is torturing him in her experiments...

...until Discord reveals that the one Spike killed is still dead, and he, the one who's being tortured, is from another universe and never committed the specific crimes Spike hates him for.

The story is a sequel to "Discord in Hell (Not Literally)" and probably makes little sense if you don't read that first. No on-screen torture. Like Spike himself, we just hear the screams and then see Spike cleaning up afterward. But if you're sensitive to gore, or implications of rape, skip this fic.