'Come on!' shouted Luthar, sliding down from his saddle, half hopping across the dusty floor. 'Come on!'

A Flathead charged towards them, shrieking, a great axe in its hand. It leaped up suddenly and turned over in the air, one of Ferro's arrows stuck through its face, but there were others. There were a lot more, creeping around the pillars, spears ready to throw.

'Too many!' shouted Bayaz. The old man frowned up at the great columns, the huge weight of stone above them, the muscles of his jaw clenching tight. The air around him began to shimmer.

'Shit.' Logen stumbled like a drunkard across to Ferro, his balance all gone, the hall tipping back and forward around him, the sound of his own heart pounding in his ears. He heard a sharp bang and a crack shot up one of the pillars, a cloud of dust flying out from it. There was a grinding rumble as the stone above began to shift. A couple of the Shanka looked up as fragments rained down on them, pointing and gibbering.

Logen grabbed tight hold of Ferro's wrist. 'Fuck!' she hissed, fumbling an arrow as he half fell and dragged her over, scrambled up and started to pull her after him. A spear zipped past them and clattered across the stones, tumbled off over the edge of the crack into empty space. He could hear the Shanka moving, grunting and growling to each other, starting to swarm between the pillars and into the hall.

'Come on!' shouted Luthar again, taking a couple of limping steps forward and beckoning wildly.

Logen saw Bayaz standing, his lips curled back and his eyes bulging from his skull, the air around him rippling and twisting, the dust on the ground lifting slowly and curling up around his boots. There was an almighty crack and Logen looked over his shoulder to see a great lump of carved stone plummet down from above. It hit the ground with a crash that made the floor shake, crushing an unlucky Shanka to flat nothing before it could even scream, a jagged sword clattering across the ground and a long spatter of dark blood the only signs that it had ever existed. But more were coming, he could see the black shapes of them through the flying dust, charging forward, weapons held high.

One of the pillars split in half. It buckled, moving with ludicrous slowness, pieces of it flying forward into the hall. The vast mass of stone above began to crack apart, tumbling downwards in chunks as big as houses. Logen turned and flung himself on his face and dragged Ferro down with him, grovelling on the ground, squeezing his eyes shut, throwing his hands over his head.