..into that ring with the post and kill them for that daedra or demon woman. Maybe somebody has a clue what I'm talking about.

Anyway, how do you lure someone there? Is it someone from a nearby town, because everyone's dead in the encampment. I haven't seen any options like, "Hey, I gotta show you something. Follow me."

I wonder this too, I brought a random follower to the ring and killed her with the sacrificial knife but nothing happened.

Has to be a follower, like Lydia. I grabbed one of the mercs you can hire for 500 and used him.

Lead a companion there and order them to touch the altar. They will do it and become trapped, then use the knife.

That is the quest for Boethia and yes it needs to be a follower like one of the housecarls, mercs, Companions, etc. You have to walk them up to a kind of pillar and tell them to activate the pillar. They will then be trapped against it and then you kill them. Any deviation will not count.

They've got to activate the altar. You use the Companion Command mode for it, press circle on PS3 or whatever the button is for Xbox/PC.

Thank you very much...I absolutely despise Lydia...so she will definitely cease to be tonight. Excellent