The Amazing Spider-Man #343 (1991)
Writer: David Michelinie
Artist: Erik Larsen
Black Cat helps a powerless (literally!) Spider-Man find Scorpion via spider tracer. Scorpion is with La Tarantula, Knockout, Whiplash, Mindblast, Bloodlust and the scientist who took away Spider-Man’s powers. The scientist reveals himself to be Chameleon. Black Cat fights all of them while Spider-Man uses the machine to restore his powers. Black Cat is down for the count and Spidey finishes off all the bad guys. Chameleon gets away. Somehow, Spider-Man using the machine made Black Cat’s powers go away. And he destroyed the machine. She seems to be okay with it.
There’s a doctor who wants to “show the world’s death merchants what is means to deal with Cardiac”. He’s Cardiac.