Is it just me or does Marvel seem to have a LOT of snake related supervillains?
Anyway, Cleopatra "Cleo" Nefertiti is a mutant who can generate bioelectricity that she can fire as energy blasts.
These blasts she calls "venom-bolts" affects living material only and causes almost instant paralysis.
Because of her bioelectric energy, prolonged contact with her can be fatal.
Asp was a member of the Serpent Society originally, but as with a lot of "bad girls", she got popular so the writers turned her into a good guy, or at least an anti-hero.
I hate it when they do that.
Besides the Serpent Society, she has been in BAD Girls, Inc. (which stood for Black Adder, Asp and Diamondback), the Femizons, the Secret Avengers and the Women Warriors.
