Ditko Comics characters introduced in 1964 Fictional assassins in comics Fictional characters from New York City Fictional characters with slowed ageing Fictional characters with superhuman durability or invulnerability Fictional professional hunters Fictional murderers Fictional suicides Fictional Russian people Fictional Soviet people Fictional immigrants to the United States Villains in animated television series Marvel Comics undead characters Marvel Comics characters who can move at superhuman speeds Marvel Comics characters with superhuman senses Marvel Comics characters with superhuman strength Marvel Comics mutates Marvel Comics supervillains Marvel Comics male supervillains Spider-Man characters