Worm was mutated in a fashion similar to the other Savage Land Mutates. The mutation was caused by a device created by the mutant known as Magneto, giving him superhuman powers and altering his appearance substantially somehow. He then joined with other similarly mutated super beings under their leader, Zaladane.
Worm has remained a loyal servant of Zaladane for some time, using his power to turn her prisoners into slaves. Zaladane employed him to amass an army of Savage Land natives to battle the mutant superhero team known as the X-Men. In the ensuing battle, he took control of the X-Men Colossus, Dazzler, Polaris, and Ka-Zar. After a short time, though, the X-Men fought off the effects of his power and were able to defeat Worm, Zaladane, and all of her other forces. Worm fled that battle, and his present whereabouts are unknown.
