Tank (Kiev) teams up with Crygen and Pyre to harness the power of a boulder of galvacite, which will make them strong enough to vanquish Metlar once and for all. However, when they storm Infernac, their enhanced magnetic powers run amuck, inducing a reversal of the core's polarity that renders Crygen and Pyre evil while changing Metlar's personality to good. The incident further initiates a chain reaction which threatens to pull Earth's deadly Van Allen belt down to the surface of the planet. Much to his own disgust, the now-altruistic Metlar brings himself to work in concert with Earth Corps to restore the natural order: they manage to reform the galvacite boulder, returning Crygen and Pyre to normal as Metlar reverts to evil and reclaims Infernac.
Inhumanoids was an animated series and Hasbro toy property in 1986. In the tradition of other Hasbro properties such as Transformers and G.I. Joe, the show was produced by Sunbow and Marvel Productions and animated in Japan by Toei Animation. Inhumanoids tells the story of the scientist-hero group, Earth Corps, as they battle a trio of subterranean monsters called the Inhumanoids with the aid of elemental beings, the Mutores.
