A general

It happened during the last battle. Your army was ready to break through the dark elven castle walls and capture their queen. Once that was done, the war would be over.

It was a long and hardy siege which lasted for days. Your enemy's general was quite skilled at defending herself. Often she organized sorties during which she destroyed your siege weaponry.

But at long last, your human engineers came up with an idea that would allow you to hurl boulders over huge distances. At first you thought they just thought of making a bigger catapult, but what they ended up with looked quite different. They called it a trebuchet. In the three centuries of your high elven life, these short lived beings always managed to find new ways to surprise you.

You quickly had several of these 'trebuchets' set up and giant rocks were raining down on your opponents castle. Once these walls were breached, you send Elvish cavalry through the openings and secured these entrances into the dark elven stronghold. High Elven and human footsoldiers strengthened these locations and master archers manned the ramparts.

Even then the battle was still difficult. Even so, you and your troops were high elves, the pinnacle of intelligent lifeforms. No matter how strong these pitiful dark elves were, they would not be able to hold you off for long, which they didn't.

When the battle was finally over, you took their general and locked her up in her own quarters. There she would wait until you are ready to teach her some lessons. How dare she withstand your assaults for so long. She made you look bad in front of your troops. Some of the other nobles made jokes about you taking so long to win. It would only be right for you to dominate her.
You couldn't quite decide what tools you'd be using first, though. The whip was always an interesting choice of course, but then there were also ropes, handcuffs, candle wax, ...

Perhaps you should just keep it limited to just one tool for now?