Root threatens Mulch with imprisonment in the goblin prison Howler's Peak, and offers the dwarf a two-day head start if he assists in the break-in. The team use Mulch's original strategy to enter through one of the titanium foundation rods. One rod was not actually solid as Mulch and his cousin had diverted sewage into the shaft instead. After reaching the bottom of the foundation rod, and climbing through Mulch's recyclings, Butler, Root and Holly mount a desperate charge to the communications centre. While the three soldiers battle through an army of goblins, Artemis enters the network of deactivated plasma cannons to reach the centre by another route. Artemis manages to sneak into the hub long enough to communicate with Foaly, who uses Artemis's laptop to play back Cudgeon's own voice, revealing that Cudgeon planned to betray the goblins. Cudgeon is unfazed, and reactivates the plasma cannons to knock out all the goblins in Koboi Labs. Butler, Root and Holly smash their way into the centre, where Cudgeon holds Artemis at gunpoint. However, Foaly calls Artemis' mobile phone, and Artemis hands it to Koboi, who is then enraged to find that Cudgeon planned to betray her too. The two masterminds grapple with each other on Opal's hoverchair, and Cudgeon is killed when he is thrown into the open DNA cannon plasma feed, while the crash causes Opal to blackout, and destroys the remote control used by Opal to control LEP weaponry. Foaly uses the restored power to activate DNA cannons in Police Plaza, neutralizing most of the goblins involved in the revolt. Foaly remains in the Operations Booth, as the LEP outside, commanded by Captain Trouble Kelp, still think he is to blame for the revolt.