He pulls his hands back, taking a step away.

"And just how much indignity do I have to survive from Winter?" Childermass reaches back again, feeling out one of the bolts. He can't pull it out, obviously, even though he tries and only ends up grimacing at the feeling the attempt brings. "As if changing my entire being wasn't enough? Now they've put this... this... I don't even know! It's disgusting!"

Whatever it is, it must be. It's from one of the Winter Court's many monsters.