Read more about Spider-Slayers at: Wikipedia

Official Site: Marvel

The Spider-Slayers are a series of fictional robot in the Marvel Comics universe that were specifically designed to hunt down, capture, and/or kill Spider-Man.

See List of Spider-Slayers for a full breakdown of all versions of the Spider-Slayer.

The first series of robots were originally designed and built by Dr. Spencer Smythe with the financial backing of J. Jonah Jameson who piloted them for the pleasure of personally hunting the superhero he hated for capture. However, Spider-Man always managed to defeat each robot in turn. Smythe's continual efforts to perfect his machines backfired on him, leading to himself being fatally contaminated by radiation poisoning from the building materials of his creations. Blaming both Jameson and Spider-Man for this, he attempted, as a final act, to murder them both, but died just before Spider-Man thwarted the attempt.

Later, Jameson commissioned another scientist, Dr. Marla Madison, to create a new and improved Spider-Slayer. While that attempt failed, he eventually fell in love with her and married her.

Spider-Slayers has not been a contender in any CBUB matches.