The calling was a magical poison that needed to be eaten by the victim to work. The poison was concealed inside food. This worked so well that a potential victim needed a lot of skill as a cook to notice that something was wrong with the dish.
When it was eaten by the potential victim, the spider eggs inside the paste hatched within two to twelve minutes causing grave physical damage. If the damaged body of the victim was not capable of digesting the hatched spiders, they started to crawl in waves out of the victim's nose and mouth, dealing even more harm to the body, and became a bloodweb spider swarm that attacked everyone in its vicinity.
The calling was a poison associated with the drow. It was one of those poisons that was the result of magical experimentation.
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Ari Marmell, Anthony Pryor, Robert J. Schwalb, Greg A. Vaughan (May 2007). Drow of the Underdark. (Wizards of the Coast), pp. 94–95. ISBN 978-0-7869-4151-3.
- ↑ 2.0 2.1 2.2 2.3 2.4 Robert J. Schwalb (September 2008). “Children of Darkness”. In Chris Youngs ed. Dragon #367 (Wizards of the Coast), p. 39.