His sorcery kept them in bonds. Then their priest, a strange, gaunt man of unknown race, plunged into the wilderness, and when he returned he bore a knife that was of no earthly substance. It was forged of a meteor, which flashed through the sky like a flaming arrow and fell in a far valley. The slaves rose. Their saw-edged crescents cut down the men of Dagon like sheep, and against that unearthly knife the magic of Khosatral was impotent. While carnage and slaughter bellowed through the red smoke that choked the streets, the grimmest act of that grim drama was played in the cryptic dome behind the great daised chamber with its copper throne and its walls mottled like the skin of serpents.