Inhumanoids

A nocturnal assault by Tendril demolishes the Earth Corps base, prompting a chase into the depths of the Earth, but even with the help of another Mutore species, the rock-bodied Granites, they are forced to retreat back to the surface. When their budget is summarily cut by Senator Masterson — a crooked politician in Blackthorne Shores shady pocket — they are approached by Sandra Shore, Blackthornes sister, who has learned of her brothers sinister plot to liberate Metlar. Funded by Sandra, the team constructs new vehicles and embarks back below the Earths surface, tracking DCompose and Tendril to the city of the Granites, where an ensuing battle frees Metlar from Magnokors hold. Having pilfered Earth Corps engineering schematics via his ties to Masterson, Blackthorne joins the fray, now equipped with his own battle-suit whose magnetic powers he wields against Metlar, only to be derailed by Tendrils interference while Sandra falls victim to the mutative touch of DCompose.

Acting on information forced from Blackthorne, the Inhumanoids raid a Soviet air base, stealing a handful of nuclear missiles. A seemingly repentant Blackthorne warns Earth Corps that the missiles are intended to shatter the divide between the Earths crust and mantle, but upon travelling into the Earth to preclude this catastrophe, the team discovers that Blackthorne has set them up and that the missiles are actually meant to detonate the planets core. Earth Corps is able to convince DCompose to allow them access to Infernac — a deal made easier by the fact that the Inhumanoid already fears for his own survival in the face of Metlars insane plan — and they manage to defuse enough of the missiles to thwart the explosive scheme.