A sharp wind off the snow slashed them, whipping their tatters about. Conan's long knife splintering through the teak panels roused the startled echoes. Again and again he struck, hewing through polished wood and metal bands alike. Through the sundered ruins he glared into the interior, alert and suspicious as a wolf. He saw a broad chamber, the polished stone walls untapestried, the mosaic floor uncarpeted. Square, polished ebon stools and a stone dais formed the only furnishings. The room was empty of human life. Another door showed in the opposite wall. 'Leave a man on guard outside,' grunted Conan. 'I'm going in.' Kerim Shah designated a warrior for that duty, and the man fell back toward the middle of the gallery, bow in hand. Conan strode into the castle, followed by the Turanian and the three remaining Irakzai. The one outside spat, grumbled in his beard, and started suddenly as a low mocking laugh reached his ears. He lifted his head and saw, on the tier above him, a tall, black-robed figure, naked head nodding slightly as he stared down. His whole attitude suggested mockery and malignity. Quick as a flash the Irakzai bent his bow and loosed, and the arrow streaked upward to strike full in the black-robed breast. The mocking smile did not alter. The Seer plucked out the missile and threw it back at the bowman, not as a weapon is hurled, but with a contemptuous gesture. The Irakzai dodged, instinctively throwing up his arm. His fingers closed on the revolving shaft. Then he shrieked. In his hand the wooden shaft suddenly _writhed_. Its rigid outline became pliant, melting in his grasp. He tried to throw it from him, but it was too late. He held a living serpent in his naked hand, and already it had coiled about his wrist and its wicked wedge-shaped head darted at his muscular arm. He screamed again and his eyes became distended, his features purple. He went to his knees shaken by an awful convulsion, and then lay still. The men inside had wheeled at his first cry. Conan took a swift stride toward the open doorway, and then halted short, baffled. To the men behind him it seemed that he strained against empty air. But though he could see nothing, there was a slick, smooth, hard surface under his hands, and he knew that a sheet of crystal had been let down in the doorway. Through it he saw the Irakzai lying motionless on the glassy gallery, an ordinary arrow sticking in his arm. Conan lifted his knife and smote, and the watchers were dumbfounded to see his blow checked apparently in midair, with the loud clang of steel that meets an unyielding substance. He wasted no more effort. He knew that not even the legendary tulwar of Amir Khurum could shatter that invisible curtain. In a few words he explained the matter to Kerim Shah, and the Turanian shrugged his shoulders. 'Well, if our exit is barred, we must find another. In the meanwhile our way lies forward, does it not?'