Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: Lunar: The Silver Star
The fates of the Four Dragons in the remakes, being used to power the Grindery and its armament. Seeing them connected with all manners of pipes and tubes, responding to Luna/Althena's unholy song, and watching the blast directed at Vane which morphs into a dragon's head is incredibly distressing as a Fate Worse than Death for them. It's not even obvious how much of it they're aware of.