As Arlok passed through the door into the hall Gordon flung himself into the room, and sped straight for the work-bench. He snatched the flame-tool up, then darted over to the wall by the door. He was not a second too soon. The heavy tread of Arlok's return was already audible in the hall just outside. Gordon prepared to stake everything upon his one slim chance of disabling that fearful tentacle before Arlok could bring it into action. He pressed the tiny switch in the flame-tool's handle just as Arlok came through the door. * * * * * Arlok, startled by the glare of the flame-tool's blazing blade, whirled toward Gordon--but too late. That thin searing shaft of vivid flame had already struck squarely at the base of the Xoranian's tentacle. A seething spray of hissing sparks marked the place where the flame bit deeply home. Arlok screamed, a ghastly metallic note of anguish like nothing human. The Xoranian's powerful hands clutched at Gordon, but he leaped lithely backward out of their reach. Then Gordon again attacked, the flame-tool's shining blade licking in and out like a rapier. The searing flame swept across one of Arlok's arms, and the Xoranian winced. Then the blade stabbed swiftly at Arlok's waist. Arlok half-doubled as he flinched back. Gordon shifted his aim with lightning speed and sent the blade of flame lashing in one accurate terrible stroke that caught Arlok squarely in the eyes. Again Arlok screamed in intolerable agony as that tearing flame darkened forever his glowing eyes. In berserker fury the tortured Xoranian charged blindly toward Gordon. Gordon warily dodged to one side. Arlok, sightless, and with his tentacle crippled, still had enough power in that mighty metallic body of his to tear a hundred Earth men to pieces. Gordon stung Arlok's shoulder with the flame, then desperately leaped to one side just in time to dodge a flailing blow that would have made pulp of his body had it landed. Arlok went stark wild in his frenzied efforts to come to grips with his unseen adversary. Furniture crashed and splintered to kindling wood beneath his threshing feet. Even the stout walls of the room shivered and cracked as the incredible weight of Arlok's body caromed against them. * * * * * Gordon circled lithely around the crippled blue monstrosity like a timber wolf circling a wounded moose. He began concentrating his attack upon Arlok's left leg. Half a dozen deep slashes with the searing flame--then suddenly the thin leg crumpled and broke. Arlok crashed helplessly to the floor. Gordon was now able to shift his attack to Arlok's head. Dodging the blindly flailing arms of the Xoranian, he stabbed again and again at that oval-shaped skull. The searing thrusts began to have their effect. Arlok's convulsive movements became slower and weaker. Gordon sent the flame stabbing in a long final thrust in an attempt to pierce through to that alien metal brain.