for madness and the void 's wild vengeance are nyarlathotep 's only gifts to the presumptuous ; and frantick though the rider strove to turn her disgusting steed , that leering , tittering shantak coursed on impetuous and relentless , flapping its great slippery wings in malignant joy and headed for those unhallowed pits whither no dreams reach ; that last amorphous blight of nether-most confusion where bubbles and blasphemes at infinity 's centre the mindless daemon-sultan azathoth , whose name no lips dare speak aloud .