- Emotion Eater (emotion)
- Spacetime Eater (the fabric of the universe/reality)
- Soul Eating (souls)
- Ingesting Knowledge (knowledge)
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Anime and Manga
- Dragon Slayers in Fairy Tail each have their own signature element, which they use to attack. They can also replenish their energy by eating that same element. Elements, of course, don't usually count as abstract concepts... except the specific case of darkness, which is really only absence of light.
- In Majin Tantei Nougami Neuro, the plot is kicked off when the demon Neuro comes to Earth to feed off the complexity generated by riddles, puzzles, and mysteries. To do so, he starts solving murders and feeding off the culprits. One of the later story arcs has Sicks offer him a mansion full of fabricated crimes for his consumption, and Neuro is appalled by the artificial riddles.
- The grammasites, from the Thursday Next series. Parasites that live in books, examples include adjectivores, spelling vyruses, and the like.
- From the Eighth Doctor Adventures, the Fendahl Predator devours concepts — as a group of beings who believed You Cannot Kill An Idea discover to their cost.
- And let's not forget about the Babelfish from The Hitchhiker's Guide to the Galaxy. That little creature feeds on the thought processes around its host and excretes a neuronal matrix into the host's brain. Incidentally, this enables the host to instantly understand any form of communication whatsoever. It is said that the poor Babelfish has wreaked more havoc on sentient life in the universe than all armies that ever marched combined, due to obliterating all boundaries to understand one another.
- Diane Duane's Star Trek novels have the Iruhe, who eat the minds of sentient beings, leaving only breathing but mindless bodies. They appear briefly in The Romulan Way, where they devour the minds of two ships' worth of Romulans (who have just left Vulcan and were in the process of looking for a new homeworld, and were lured in by the Iruhe's illusions of a water-rich, habitable planet); the rest of the fleet barely escape. The Iruhe are also the villains of her TNG book Intellivore, where they have gained the ability to move their planet about to prey on planets rather than just starships.
- The eponymous darkangel in The Darkangel Trilogy must feed on the souls of human maidens in order to complete his transformation into a vampyre — leaving them mindless, emotionless "wraiths" who slowly wither away physically as well.
- In The Nekropolis Archives, Waldemar is an ancient vampire who subsists on memories rather than blood. He runs the Great Library of the Nekropolis, selling information in exchange for eating one day's worth of memory from the person seeking it.
- In Effigy Nights by Yoon Ha Lee, magic is used to bring legendary heroes to life to fight a Galactic Conqueror. Unfortunately the magic devours all the stories in the civilization to create more and more warriors, cutting them out of books and eventually people.
- Red Dwarf has the emohawk, a domesticated breed of the Emotion Eater ploymorph that instead feeds on personality traits, during its episode it enjoys a meal of Rimmer's bitterness and Cat's cool. While this left the Cat in his bumbling and useless Duane Dibbley persona, it radically helped Rimmer, who became his heroic parallel universe persona Ace Rimmer. What a guy!
- Buffy the Vampire Slayer season five Big Bad Glory had to manage her hell god composure by eating human sanity, leaving her victims gibbering wrecks.
- Doctor Who has a few examples;
- The Weeping Angels send people back in time so they can feed on the lives they never lived. To resurrect an entire cave system of dying angels, one crashes a starship into it that happens to harbour one of Series Five's cracks in time; the Angels have a feast on all the lives the crack had stolen from existence, until the crack starts swallowing them.
- In "Amy's Choice", the psychic pollen that places the Doctor, Amy and Rory in a shared dream state fed off the darkness in its victim's minds, creating the image of the Dream Lord as a manifestation of the Doctor's own self-hatred.
Amy: But why didn't it feed on us, too?
The Doctor: The darkness in you pair, it would have starved to death in an instant. I choose my friends with great care. Otherwise I'm stuck here with my own company and you know how that works now.
- The minotaur from "The God Complex" eats faith and lives in a maze designed to show its inhabitants fears that will cause them to call onto their faiths, "cooking" them.
- The planet-sized creature known as the Old God from the episode "The Rings of Akhaten" fed on stories. The people living in his system used items of sentimental value as currency so they could be given as offerings to it and taught their Queen of Years all the stories of their culture so that if it ever awoke he could feast on her rather than their entire system. They even believe that the Old God made the first life in the universe, possibly to create tasty stories for it to feast on.
- The Trickster (from Doctor Who spin-off The Sarah Jane Adventures) and his minions, the Trickster's Brigade, feed on the chaos created when an established timeline is altered in some way.
- The Teller in the episode "Time Heist" eats guilt, and will turn your brain to soup to get to the buried stuff.
- The episode "Flatline" features bizarre creatures which eat dimensions; shrinking items or turning them into images for sustenance.
- The Wraith in Stargate Atlantis consume human life forces via organs in the palms of their hands.
- Sleepy Hollow introduced a "sin eater" in Season 1: it was the ruse by which Ichabod Crane's evil son began insinuating his way into Crane's life to take revenge.
- Channel Zero has the creatures inhabiting the No-End House. Duplicates of the loved ones of those who enter the House, they feed by conjuring up manifestations of the guests' memories, and then eat them, which in the process erases those memories. This process eventually renders the victim an Empty Shell, which isn't good news for the duplicates either, as they can only feed on the memories of the person they were created from; without them, the devolve into zombie-like creatures.
Myths & Folklore
- Dungeons & Dragons
- Several monsters eat the psionic energy of psionic creatures, such as Brain Moles, Cerebral Parasites and Intellect Devourers.
- The undead known as a shadow drains the strength of other creatures.
- The Forgotten Realms setting has Dendar the Night Serpent, an Eldritch Abomination who feeds on the nightmares of mortals and deities alike. Among the duties of the Chultan god Ubtao is guarding the Realms against Dendar's emergence from beneath the Peaks of Flame. If Dendar defeats Ubtao, legend has it her next meal will be the universe itself.
- The Word-Eater of Clan Malkavian in Vampire: The Masquerade is well-known for this sort of thing: having transcended his need for blood, he's instead taken to devouring words and the ideas associated with them; more frighteningly, the words and ideas he consumes cease to exist and cease to ever have existed - hence the reason why nobody can remember the Word-Eater's true name or any of his victims. Even the Clanbooks aren't safe from his appetites, the original Malkavian clanbook depicting him in the act of eating the words right off the page, and looking decidedly interested in the reader...
- Magic: The Gathering has Chronatog, a relative of the artifact-devouring atog that eats time.
- Drowzee is a Pokémon that is famous for eating dreams, like the mythological baku it is based on. It's hardly the only Pokémon to do so, as other Psychic and Ghost-types are also capable of learning the move "Dream Eater", which does damage to a target and heals the user, but only if the target is asleep.
- Other Pokémon are said to consume emotions.
- Keine Kamishirasawa from Touhou is a were-hakutaku, whose ability is to eat history in human form, and create history in hakutaku form. It is unexplained how she eats history, but the effect seems to conceal the thing whose history is being eaten, without actually removing its existence.
- The tutorial of Heroes of the Storm has fun with this idea.
Diablo: How tastes your fear, mortal!Raynor: I wouldn't know, I'm not sure you can actually taste fear.
- In The Elder Scrolls V: Skyrim, the Daedric Prince Vaermina has been eating the dreams of the inhabitants of the town of Dawnstar, leaving nightmares in it's place. The quest Walking Nightmare involves helping a Mara priest named Erandur to seal Vaermina shrine and stop her from eating more dreams. If you side with Vaermina, betraying and killing Erandur, she will give you a staff that also charges its power from "eating" dreams.
- The Phantom mobs in Minecraft are undead flying manta rays that are "attracted to insomnia". They appear in the skies at night when a player hasn't slept for 3 days and swoop down to attack that player.
- Grrl Power: Vehemence is "an innate user of vehemic energy... sometimes called vistric energy." The layman's version:he gains power from violence. He makes his debut by sticking around an all out super brawl between a super hero team and a team-up of villains. Only when it's over does he enter the fray himself, now strong enough to go toe-to-toe with one of the most powerful super beings in the world and only making himself stronger for it.
- Dabbler is a succubus and the team's resident Jill of all Trades. She feeds on tantric (sexual) energy.
- In Dan and Mab's Furry Adventures , the resident Succubi and Incubi passively feed on the emotions of surrounding creatures. They are able to eat souls, though probably most of them don't, since that would get them in trouble rather quickly. Also, the various clans each have one emotion they especially like, which include Pride, Pain, Anger, Lust and Joy. Because of their abilities, they are vulnerable to mental manipulation. For instance, you can remember being tickled "at" them, and they will react as if it were actually happening. They also don't need to sleep or eat when receiving enough emotional energy. However, they do enjoy coffee, ice cream and other 'treats' just like every other living creature, and they can sleep if they want to, although they do not dream. Emotional consumption apparently replaces the effects of REM sleep.
- Homestar Runner has the King of Town, who's capable of eating holidays according to the cartoon "Happy Hallow-Day".
Strong Sad: Cough it up, King of Town! We know you ate Halloween Night!King of Town: You amateurs, you don't know what you're talking about. I'm on a diet! It's strictly Arbor Day and Earth Day for me this year.
- Adventure Time has a few examples; a character who eats drawings from within the paper they reside, and Marcelline, a vampire who eats not blood, but the colour red.
- In the Italian animated series Tommy And Oscar, Oscar is a pink alien who eats music — not, it should be noted, music as a concept or sound waves, or anything like that, but actual musical notes, which are physical if ephemeral objects in the series. His typical breakfast consists of turning on the radio, grabbing the notes as they float past and popping them in his mouth.
- In the My Little Pony: Friendship Is Magic episode "Swarm of the Century", the parasprites at first eat all the food in Ponyville. When Twilight Sparkle casts a spell on them to make them stop eating all the food, they instead start to consume everything conventionally inedible. This trope appears when they eat the words out of books, sucking them in like spaghetti.