Daniel, Brienne and Luna had always wanted to climb a mountain before. Now was their chance, and just in case they'd never have another chance again, they'd climb the highest one they knew of. Mount Everest had a breathtaking view, sometimes literally because of the sheer altitude and thin atmosphere. One would need very deep lungs just to tolerate it there.
All was not well, however. Daniel, in a delirium from seeing how big the peak actually was, fainted. Neither Brienne nor Luna noticed, as they were on the other side. One thing Brienne was afraid of was tonight's full moon. She was a werewolf and had good reason to fear it. Daniel, due to poor planning, did not have a wolfsbane potion for her. At least high up in the mountain, she needn't fear killing anyone or being killed by angry villagers.
Soon, Daniel was dragged off by a Death Eater. The man, who called himself Monty, had Daniel literally pinned to the wall in a cabin. Daniel's wrists bled slowly, and they really hurt having pins stuck in them. He was stripped to his underwear and razors were run across his skin. Cruciatus wouldn't be used yet, since Monty didn't want to go all out just yet. Daniel had yet to yield to the evil, and Cruciatus would drive him insane to the point where he was of no use to anyone anymore.
Daniel screamed at the sharp pain from the pins and razors. He'd give up soon, he knew it.
"That's right...give in. Give in to the Death Eaters. That's right."
"No!"
"You do want me to stop, don't you? Or would you rather I move onto a more, need I say, torturous device? Like Cruciatus? Or maybe I'll put pins through your gonads. That'll make you bend."
"Just stop! Take me back! I beg you!"
"Give in first. Then convince me that you are ready for me to set you free."
"H-how?"
"Attack your friends."
"You sick bastard...okay...I'll do it."