very cool, here's some more info on her:
Fictional character biography
Madame Claire Voyant is a spirit medium who communicates with the dead through supernatural means. She has blonde hair and an eerily flowing green dress. While serving a family named the Waglers, she is possessed by Satan to put a curse on them. James, a member of that family, survives a subsequent car crash provoked by the spell, and returns to Claire's quarters and guns her down.
Voyant's soul goes to Hell, where Satan dresses her in her Black Widow costume, which has a spider-like design on the front, a green cape similar to her dress, and boots with fire designs on the trim. He gives her the power to kill with a single touch of her fingers to the head (which leaves a branded "Black Widow mark"); to summon flames; and to use other mystical tricks. Satan who, daringly for the time, was discreetly depicted as a nude man sends her back to Earth to avenge her death. After killing her murderer, she returns to Satan, who, no longer content to wait for evil souls to die a natural death and perhaps repent their sins in the interim, charges her with bringing those souls to him. "On the upper world are mortal creatures whose hearts are blackened with wickedness and corruption. You, the Black Widow, will bring their souls to me!"
She later kills corrupt arms manufacturers, crime boss Garvey Lang, members of a syndicated called Murder, Unlimited, and the villain Ogor, while also healing Ogor's victim. In a 1990s retcon, she aids the Invaders against the Nazis.
Her introduction in Mystic Comics #4:
Introducing the strangest, most terrifying character in action picture magazines the Black Widow. You've heard of the black widow spider that evil creature whose bite spells doom. Now start the adventures of another black widow a human tool of Satan whose very touch means death.
http://en.wikipedia.org/wiki/Black_Widow_(Golden_Age)