When his chores were done, Droog spent his time hating the Master. It was easy; the Master did not exert much effort to make himself lovable. His castle was dark, damp, and full of screams. Droog's plans were complicated by the fact that no weapons were allowed within the Master's castle, but he was sure he would find a way, sooner or later.
When Droog found the Master lying dead, he was a little taken aback. There was no sign of who had done it; just the gently spreading pool of blood.
Droog shrugged and began to scrub the floors.
Mims on the Rise of Killer Robots
4 hours ago