Back in the far right corner of the cell, it was just possible to make out Sirius's huddled form. After having expended much of his energy scratching death threats in the dirt floor of the cell, he had curled up into the tightest ball possible and tried to sleep. That was, of course, impossible, so he had moved on to trying to shut his mind off. It was an old trick he had used countless times in his twelve years in this very cell, and a very simple one: you laid down, shut your eyes, and stopped living. It wasn't real death, but imagining it was good enough to stop dark thoughts from screaming inside your brain for a little while.
The dark elf's voice cut into this solitude, but Sirius was far enough gone that he didn't feel compelled to respond. He just continued to lie in his tight ball, motionless.
"Poor wittle Sirius Black.... betrayed yet again by his stupid little friend. Left here to rot for all eternity and for some stupid brain dead female. .... How does it feel, knowing youre just a pawn? Set up. Part of a trap."
Her words nudged Sirius's mind in all the wrong places, but still weren't quite enough to draw him out of himself. He had gotten very good at retreating from life over those previous twelve years, and it wasn't something that one forgot easily.
"I'll let you in on a little secret..." She went on, "See, I knew your dumb little friend would betray you... he has all sorts of pretty connections. Him being a werewolf and all. I smelled it immediately on him. Besides the stench of disgrace and pity, that is. But yes... Fenrir... oh, pretty pretty Fenrir. He thinks he will be able to get Fenrir in here, and then he will want to BAM! Do him in.... but oh no, teehee, see, I knew he'd do that. And when he does, you, him, and your pretty little werewolvette will all be in Azkaban together. Separately, maybe one in a cell down there," she pointed, "Maybe the other one way, way, way down there. But together. Figuratively. Maybe I'll let Tonksy be the free one, just for shits and giggles.... I suspect your girly will be the one who will break down first. Crying and screaming, much like Tonksy. But oh no, she's weaker than that. She'll die in here. Cold and alone..."
Sirius moved so fast that he wasn't even a blur. He was in a tight ball in the corner one moment, and across the cell with his hands around the elf's throat the next. He made no sound, not even a grunt of effort. His face held no expression aside from a burning hatred deep in his eyes.
The elf hacked a bit as it gasped for air.
In less than three seconds the surrounding shadows had caught Sirius and subjected him to pain and torture far beyond the unforgivable curses. Sirius now had the joy of experiencing Elvish torture.
Still, Sirius made no sound. The lingering effects of his earlier drinking spree, coupled with the all-consuming anger he felt towards both Remus and "Tina", occupied him enough to keep him from screaming.
But hell did he feel the pain.
The pretty elf lept up with a sick grin on its face. She held out her hand and with a soft *pop* a small round jar appeared with a tightly corked lid. Inside the contents were completely black, but somehow still glowing.
"Are you familar with ectoplasm, Mr Black?"
As Sirius was still getting his ass kicked by shadows, he said nothing. There was a very good chance that he wouldn't have said anything, anyway.
The elf giggled, and continued.
"It's a large family of invisible creatures... some are very closely related to Elves, in fact. I could go on, but.. I think it's best to just show you." She hoped through the bars and walked on top of Sirius' chest, while the shadows held him down. She opened the jar and dumped the lump of black fog onto his face. At first it was still, but after a moment of waking up, it writhed and twisted around, desparately looking for a place to call home. Within moments it had burrowed into Black's face through his ears, nose, mouth, and eyes.
Sirius would now get to enjoy all the same joys of Tonks.
Given the current state of Sirius's mind, the demonic little creatures were probably feeling right at home. They were about to have a hell of a time partying down with his darkest thoughts. (His bloodstream was so full of alcohol that it technically was possible.)