Wiktionary
mutator
n. That which causes mutation or change
Wikipedia
Mutator
Mutator may refer to:
Usage examples of "mutator".
The boy's DNA contained markers for the mutator gene, and Stryker's contacts within the American intelligence community had led him to Xavier.
Every person who possessed the mutator pairings in their genome, even if it was only potential and unlikely to be activated for one or two generations yet to come, was revealed to him.
While trying to annihilate every person on this globe who possessed the mutator gene.