Myrlochar

The Myrlochar, also known as a soul spider, was a demon creature of Lolth.

Description
The monstrous myrlochars resembled giant brown-green spiders with a round body with eight legs and a fiendish head with eight red eyes.

Ecology
These foul servants of the Spider Queen could be summoned by the drow favored priests of the goddess.

Sourcebooks

 * The Drow of the Underdark
 * Monsters of Faerun