Note: Many of Mr. Sinister's original recruits have been killed and resurrected multiple times as clones from his bank of genetic material.
|Wanted by the United States Government.|
|Nation or Planet of Origin|
|Base of Operations|
|Resources of members.|
|Uncanny X-Men #210 (Oct. 1986)|
|Chris Claremont, John Romita Jr. & Dan Green|
Convinced that unfit mutants were a threat to the future of mutant-kind, the geneticist Mr. Sinister had the thief Gambit recruit an army of mutants with the intention of destroying those he deemed unfit. Their first target was a community of mutants living in the sewers of New York known as the Morlocks.
After massacring the Morlocks, Sinister's assassins continued his mission; plaguing the mutant community as the merciless Marauders.