One of Our Favorite Mental Organisms Designed Only for Killing: MODOK

Wiki:

MODOK is a fictional comic book supervillain in the Marvel Comics universe. His name is an acronym for Mobile/Mental Organism Designed Only for Killing. MODOK first appeared in Tales of Suspense #94 (October 1967), which was written by Stan Lee and illustrated by Jack Kirby. In 2009, MODOK was ranked as IGN's 100th Greatest Comic Book Villain of All Time

George Tarleton was born in Bangor, Maine. As an adult, he became a technician and agent of Advanced Idea Mechanics (AIM). Scientists at AIM created a powerful being to analyze and probe the Cosmic Cube and to improve the organization's productivity in its scientific endeavors, while still being subservient to the higher echelons of the organization. To that end they mutagenically altered Tarleton, one of their technicians of average intelligence, into the super intelligent being MODOC (Mobile/Mental Organism Designed Only for Computing). These scientists unwisely did not take into consideration the theory that superior ability naturally leads to superior ambition.

It did not take long for MODOC to turn on his former masters and overthrow AIM. He adopted the new acronym for his title: MODOK (Mobile/Mental Organism Designed Only for (or perhaps Devoted Only to) Killing) at this time as he was more of a ruthless killer than a bean counter in his own estimation. MODOK battled Captain America in his first appearance.Later, he battled Doctor Doom and was defeated by Namor. MODOK and AIM frequently came into conflict with the Avengers and many other superheroes.

AIM was not happy with MODOK's megalomaniacal and short-sighted leadership and he was frequently ousted only to return to power again. MODOK was so focused on his personal grudge with various superheroes that he ignored the scientific aspect of the organization and allowed it to become stagnant. The other AIM leaders eventually hired assassins to eliminate him. The George Tarleton variant of MODOK was hunted down by the Serpent Society and killed by Death Adder at the Newburg Mall in Newburg, New Jersey, during the Serpent Society's first mission. The Serpent Society later returned MODOK's body to AIM, who used it as originally intended in the function of a supercomputer. However, rogue AIM agent Yorgon Tykkio remotely operated MODOK's body in a fight with Iron Man that led to its destruction.