PesterPrime 4

The low gravity and barren landscape of the lunar surface greeted the pair as they appeared. The doctor boggled at his surroundings, but the robot was already at work, dispensing a swarm of nanomachines to begin converting rough rock upon which they stood into the raw materials that would be necessary...

[...]

Just like that, they were in microgravity, floating through a void of blackness with pinpricks of white, far below them the graceful arc of Earth. They clearly saw the oncoming, titanic machine. Even through the overwhelming silence of the vacuum, the sheer intensity of D. E. S. T. R. O. Y. O. T. R. O. N.'s hatred carried his words into their ears, into their minds, into their very souls. A thousand colossal arms splayed from behind it, all ready for battle.

"Now I am become Death, the destroyer of worlds!" the destroyer proclaimed. Its tiny, true body piloted from the 'head' of its destroyer form, composed of the compressed metallic components of many thousands of tons of lunar surface. Riding in a small cockpit near the chest, seeming just as terrified as any of them, was the Plague Doctor's doppelganger. He frantically pounded a pointy stick against the glass window, to no effect.

***
Cack Hard 2: Revengeance: Reloaded