History
The Symbionts were a race of spine-like creatures from the Crossroads-adjacent dimension World of Symbionts. The symbionts evolved to attach themselves to other animals due to their lack of mobility. The world had become harsh due to intense solar radiation and turned much of the food poisonous. The symbionts were able to negate the ill effects of the food to the animals on the planet and were able to gain mobility in return. One such symbiont named Sym attached itself to the Hulk after he had killed its prior host. Sym and Hulk established a close relationship until Sym's death.[1]
Powers and Abilities
Abilities
Poison-negation when attached to a host
Weaknesses
Poor mobility