The Age of Worms
Worms that spring from the Spawn of Kyuss to infect their enemies and turn them into undead. The worms burrow their way into a victim and head for the brain stem. They are the result of Kyuss’ efforts to transmit undeath through a living organism, like a virus. Bright green with teeth lining their face-holes, the worms, which are, in fact, not undead, burrow into living hosts and infect them, turning them into the Spawn of Kyuss. There are also “slow worms”, which produce the same effect, only after a gestation period causing dementia and confusion before death, and the subsequent undeath. This disease can be halted with a remove disease spell. Legend claims that the worms come from the actual flesh of Kyuss, in a way that transcends all laws of nature, and carry the tiniest seed of his knowledge, hunger, power, and need to to spread, destroying life wherever they go.
The party is currently aware of three kinds of Kyuss worms: the “baseline worms” which live in the Spawn of Kyuss; the ones in Illthain’s egg, which were smaller, thinner and clearly a different variety; and finally the worms that infected the potions stored in Illthain’s chest, which appear to be magically altered to be dormant in liquid and to die when they hit the air.