—Lan Mandragoran, The Eye of the World, Chapter 49
—Sammael, Lord of Chaos, Chapter 23
A jumara, also known as a Worm, is a type of Shadowspawn that was created by Aginor sometime before or during the War of Power, currently found in the Blight. The jumara are merely a larval stage to an even more horrible and dangerous type of Shadowspawn. The jumara that currently plague the Blight will never transform.
Jumara are extremely dangerous. They appear as large worms and their movement makes a very loud squishing sound. Traveling in packs called Wormpacks, a person can hear jumara cry to one another, a chorus reedy and shrill. A jumara can kill a Myrrdraal; most of the terrifying creatures in the Blight will flee from a jumara, although jumara themselves are scared of that which lives in the high passes.
Jumara are very effective at overtaking prey. In order to survive an encounter with jumara, the Worm must be cut to pieces.
Adult jumara are colossal multi-pedal insect creatures with an enormous cavernous mouth with spines and tentacles. Use of the One Power against them makes them stronger. It is speculated that Aginor did not intend for jumara to serve in the Shadow's armies, but simply wanted to see what was the most twisted beast he could create.
While searching for Sakarnen in Shara, Demandred encountered an adult jumara at Rai'lair, The Hearttomb. Somehow the creature had found the ancient cavern, and matured to adulthood. Demandred slew the creature, but barely survived.