also here is a list of the races in Halo from least to greatest. -Current humanity ( our timeline humanity) - they built the pillar of autumn - could easily make a crater kilometers wide with a single mac cannon, also they have a few bombs capable of destabilizing ( almost completely destroying) a small moon edit: The Pillar of Autumm is not the ship capable of creating said multi kilometer-wide crater, the UNSC Infinity is. in terms of firepower, the Autumn can probably make like a half-kilometer explosion. -The covenant - capable of bombarding every square meter of a planet's surface, making it inhabitable. in comparsion to Current humanity, could also blow up moons and/or planets -Ancient Humanity - same type of technology concepts as the covenant, except more advanced- (let your imagination flow in terms of destruction power by comparison) -Forerunners - they can literally create planets, consume universes for power, and completely atomize entire body's of mass in terms of destructive power -Precursers ( their ships were literally invulnerable until the halos fired, destroying their biological core , causing them to disintegrate) in terms of destructive power.. literally everything. think of being atomized across the entire space and time continuum, not only is the target atomized, but scattered across dimensions, universes, quantum foam, and space and time ( [i]you are forever lost in the dark corners of time[/i] )