With Wilbur dead, no one attends to the mysterious presence growing in the Whateley farmhouse. Early one morning, the farmhouse explodes, and the thing, an invisible monster, rampages across Dunwich, cutting a path through fields, trees, and ravines, and leaving huge prints the size of tree trunks. The monster eventually makes forays into inhabited areas. The invisible creature terrorizes Dunwich for several days, killing two families and several policemen, until Armitage, Rice, and Morgan arrive with the knowledge and weapons needed to kill it. The use of a magic powder renders it visible just long enough to send one of the crew into shock. The barn-sized monster babbles in an alien tongue, then screams for help from its father Yog-Sothoth in English just before the spell destroys it, leaving a huge burned area. In the end, its nature is revealed: it was Wilbur's twin brother, but he "looked more like the father than Wilbur did."