A list of six cursed items that do exactly what they seem to do.
My concept of cursed items isn't objects that stick you with a negative modifier and can't be put down - although those have their place. It's perfectly serviceable items that perform a valuable function in a way that compromises the character's values.
Admittedly that's not much of a threat to murderhobo characters. But the caveats for these items should at least make non-chaotic players pause and then avoid the GM's eye while mumbling about the end justifying the means!
1. Death Holds No Secrets
A gem-studded collar that can temporarily revive a being dead for less than INT bonus days and no more than user's level+INT bonus HD to answer three questions in full. The being can save vs Magic to resist. After the questions have been answered, the collar returns the being to its rest.
After Death Holds No Secrets has passed out of range, there is a 3-in-6 chance of the being reviving again as a hostile undead with HD up to user's level.
2. Stand-Alone
A sword with faceted obsidian inlaid in the pommel in place of a gem. It allows the user to reduce the closest ally NPC's STR bonus by 1 in order to gain the same bonus until the end of a combat. The borrowed strength does not return to the NPC.
(Technically, the effect should apply to PCs as well. Would you want to be in that game? I wouldn't. I wouldn't want to be the same building.)
3. The Uneasy Crown
A simple gold crown, decorated with gold wire and rubies. This item only works if placed on a second person's head by someone who knows the passphrase, 'uneasy is the head'. After that, if the crowned one gives an order anyone with a lower charisma modifier will carry it out automatically, provided it isn't dangerous to them. (Save vs device to resist.) Each time an order is given, the crown tightens slightly. It cannot be removed until the person who crowned the wearer speaks the passphrase. That person is immune to the crown's effects. After being removed it cannot be used again by the same wearer. It will immediately tighten until it's too small to place on their head.
4. The Mirror Gem
The owner of this gem can enter a magical sleep and possess whoever wears the gem. The possessed wearer will look and sound like the owner, and has no will of their own while their actions are being directed. The wearer takes 1d4 HP damage each week they wear the gem. That damage can never be recovered.
5. Man-breaker
This is a lash with a core of hardened clay in the hollow handle. Each time it's used on a person, the victim loses a point from either INT, WIS or CHA and gains one in STR or CON. Over time their skin becomes more and more clay-like until they lose their last point of mental attributes and transform fully into a clay golem, good only for manual labour.
6. Persuasion
A narrow chain, with spiked links. If one of the spikes is used to nick a victim, the entire cord will slither inside through the wound and coil around their bones. From that point, if they refuse to follow when ordered to the chain will constrict, causing awful pain. Persuasion leaves a body the way it enters, but causes a lot more damage in the process. Most die.