The writing on the wall. A mystical phenomenon that tells of a dire future for those who witness it. Specific types of portents include: * Bad Moon Rising: A celestial event foretells doom. * Comet of Doom: The arrival of a comet as a bad omen. * Dead Man's Hand: A poker hand with two Aces and two Eights means death. * Dreaming of Things to Come: When nightmares are soon to come true. * The End Is Nigh: Those doomsayers and signholders know what they're talking about. * Flying Dutchman: Just seeing the Trope Namer was a portent to an unlucky crew. Even worse if the Ghost Ship tried to hail them. * For Doom the Bell Tolls: A church bell foretells death. * Hell Hound: The Portent variety spelled death or grave misfortune for whomever saw them. * Ominous Fog: