Reapers, also known as Harvesters, are fictional entities often depicted in science fiction and fantasy genres. They are typically portrayed as advanced machines or beings that harvest life forms, usually for the purpose of sustaining themselves or their creators. In many narratives, Reapers are associated with themes of death and destruction, often serving as antagonists. In the popular video game series Mass Effect, Reapers are ancient, sentient starships that periodically emerge to cull advanced civilizations. Their primary goal is to maintain the balance of life in the galaxy by eliminating species that have reached a certain level of technological advancement. This cyclical process raises questions about morality, survival, and the nature of existence.