Unspeakable horror
From Jenny Everywhere Wiki
In one universe, an interdimensional “unspeakable horror” invaded the plumbing of Junter and Ibdis's apartment. Junter attempted to defeat it, but was unsuccessful, although Junter's efforts did cause the creature to spit out a letter of invitation to Kokotomo Island. In the end, Junter and Ibdis conned Mr Norman into buying the apartment from them, without having gotten rid of the horror. (COMIC: A Letter From Beyond)
