 In "The Silmarillion", it is stated that when she went into hiding her hunger was such that she would mate with other spiders only to devour them later, with her offspring used as food once fully grown.According to "The Silmarillion", Ungoliant's unremitting hunger drove her to devour herself, although an alternative sketch of Eärendil's voyage suggests that he slew her in the south.According to Tolkien scholar John Wm.