His nostrils flared and he gasped a bit as he followed the directions down the stairs. Death rolled against his stomach, and it made the wolf howl even louder. The wolf didn't want old death. It wanted new death, it wanted to be the cause of new death. The claws tightened in the bitch's hair, scoring into her skin and if she hadn't been petrified she might have been screaming. He could feel the blood on his fingers, seeping into his paws as he moved forward, almost doubling over. A quick toss followed, the woman's body made an assortment of delightful cracking sounds when it hit the lowest bit of stone.
Remus couldn't be fully vertical now. His body wasn't built for it. Liquid, thick and viscous was moving from his body as the changes were coming closer to skin level. As he bound down the stairs, the already ragged robes tore and gave way, allowing the moving muscles and shifting bones of his spine to be viewed below the graying tones of his skin. He was growling almost constantly now, because that was what his verbal skills could offer to him. Remus Lupin wished he could abuse the woman verbally, he wished he could make her doubt herself like Sirius did... but he couldn't. Instead, he would make her wish that she was dead every moment for the rest of her life.
“Sssstay.” He managed to growl to Sirius, and his lower jaw was extending when he turned his head back. He was half human and half wolf now as he bound down the stairs to the lower level. Once more he grabbed her by her hair, the coarseness tangling into his paw. The second level was easy to find, and he was running now, almost going into full lope as he smelt old death and metal of the cages. Lupin threw her into the most open one he could find, and then he slammed the door behind it. Quick movement of claw over clothe found her wand, and he held it in front of her eyes as he snapped the wood in two. And then he moved to the corner of the cell.
His hands extended in front of him, and he let the spell that the cunt was under slip away. He wanted her awake. He wanted her to try and run, he wanted her to fight. Oh, it was so much better when there was a fight. He howled at the moon, cursing it and offering a love song to the unseen orb. Fluid dropped around him and he howled again as his body broke and reformed itself, and then the wolf sat there. He sat there and he almost grinned; Lupin was ready to feed.