Snake-based Superheroes?

[Dr. Cringle]

You know, I was thinking about snakes/bugs (due in part to my rampant boredom), and suddenly I thought 'you know what? I can't think of any snake-based superheroes!' Any. I mean I could think of a number of snake-related or snake-based villians, but heroes? I'm drawing a blank. I can think of a number of superheroes based on all so sorts of batshit insane (bat, gettit? lul) character concepts, but not once can I think of one that has a snake as a basis. Is it just because in general snakes/serpents are still considered popular symbols of evil?