Fun fact: Derpfestor betrayed the purple zerg by escaping with the aforementioned drone, probe and SCV. Derpfestor used the drone to create a hatchery and the probe to warp in a nexus. He spawned infested terran to blackmail the SCV into building a command center for him, creating the Red Team which featured all three races. In "Protoss Party", Derpfestor appeared to give his subjects a speech with infested terrans as security detail. However, instead of giving a speech, Derpfestor ate the microphones. Nevertheless, his subjects applauded and cheered. Derpfestor mind controlled a blue protoss mothership and switched it to WoL mode to allow it to recall troops to any location. They recalled the entire red team to a blue protoss base. However, despite being severely outnumbered, the blue terrans, blue protoss and purple zerg formed a three-way alliance to defeat the Red Team. While hiding in a red barracks, Sgt. Patches and Crackhead encountered them while trying to free the aforementioned blackmailed SCV. Derpfestor spawned infested terrans to kill them, but they timed out before killing them. Sgt. Patches and Crackhead then began shooting at him. However, they used his neural parasite on Sgt. Patches, forcing him to turn on his own ally. The blackmailed SCV managed to escape and used his fusion cutter to break the neural parasite tentacle, removing his mind control. The blackmailed SCV used his drill to push Derpfestor out of the lifted building, presumably killing him. However, a transmission in "Season 4 Episode 0" flashes the words "Red Is Not Dead" and an image of Derpfestor, hinting at Derpfestor's return.
So he basically made an army that almost killed literally everyone