who is dr.landon(marvel)?

i was watching the old spider-man series(1990s) and the kingpin had a right-hand man and scientist named dr.landon.normally, i’d check marvel characters i didn’t know in my marvel encyclopedia,but he wasn’t in they(at all).so please tell me who this person.P.S. half of him is some green mutant thing if it helps

He was a former friend of Hank McCoy. He first appeared in season two, of spider man as a scientist working for the Brand Corporation, but secretly working for the Kingpin. He despised mutants and had developed a chemical that would destroy them, while he pretended to be making a mutant army for the Kingpin and lied to the public he was working on a mutant cure. When the Hobgoblin attempted to steal Landon’s formula, a fight ensued in which Landon was doused in his own chemicals, turning him into a 30 ft mutant, needing to feed on electrical energy to survive. Luckily, the X-Men and Spider-Man were able to reverse the procedeure, but the accident left Landon with a permanent mutated half-face. After that, he joined forces with Spider-Man’s arch foe, the Kingpin, and served as his key scientist.

Following this, Landon was portrayed as half-human and half-reptilian (his mutant form), and Kingpin’s sidekick. He used his knowledge of bioengineering to transform Alistair Smythe into the Ultimate Spider-Slayer and replacement partner to the Kingpin, taking Alistair’s spot. He also reacreates the super soldier formula in order to turn Felicia Hardy into the Black Cat. In The Awakening, at the end of the episode, Landon is seen in the hospital right after Morbius drains his plasma. Landon makes a cameo appearance in the following episode, where in he was hypnotized by Mirium into stealing the Neogenic Recombinator from Kingpin. He was later seen fully recovered in the fifth season premiere and last appeared in the five-part episode saga that followed the fifth season premiere.

Herbert Landon did not possess any superhuman powers (Except in his original monstrous mutant form), but was a brilliant scientist, and an expert in genetics

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