Harry took a deep breath and picked up the smallest bottle. He turned to face the black flames.

‘Here I come,' he said and he drained the little bottle in one gulp.

It was indeed as though ice was flooding his body. He put the bottle down and walked forward; he braced himself, saw the black flames licking his body but couldn't feel them – for a moment he could see nothing but dark fire – then he was on the other side, in the last chamber.

Chapter 16