- Food (classic-style vampires)
- Enhancing their power
- Satisfying a blood-consumption fetish, Horror Hunger or other psychological addiction
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Anime And Manga
- Hollows feed on spiritual energy as a secondary source of nourishment (the primary being the "hearts" of both living and dead Humans). Sources include humans, Soul Reapers and other hollows.
- Another example would be Ayasegawa Yumichika. This ordinary Bishōnen Blood Knight is hiding his true power, which drains the spiritual energy of his target. When he does decide to use it, his battles end with a single strike. He can then use the drained energy to heal his wounds.
- Mahou Sensei Negima! Evangeline A.K. Mc Dowell]] has the standard "vampire sucking blood" variant. She doesn't actually need blood to survive, but drinking it causes her to gain strength.
- Several Youkai in InuYasha, as is, occasionally, the title character's sword.
- Okoi from Basilisk can suck the blood of her enemies by touching their skin with hers. She vomits the blood out afterwards though, so it's basically just a way to attack and nothing more.
- Jojos Bizarre Adventure has vampires in the first three parts, each of which feed on blood... with their fingers. They need it to heal their wounds (and in Dio Brando's case, to finalize the connection of his head to Jonathan Joestar's body). Part 4 gives us the Stand Highway Star, which breaks down a person's body by draining the nutrients from their cells; its user uses the stolen nutrients to help him recover from grievous wounds suffered in a motorcycle accident.
- The true form of the Juubi in Naruto is capable of draining all of a shinobi's chakra in seconds. This is invariably fatal.
- Wicked City. The Black World radical masquerading as a call girl absorbs Giuseppe into herself and drains almost all of his Life Energy.
- Demon City Shinjuku. In the 1988 OVA Chibi tells Sayaka Rama that the Fire Demons take the form of young children and roam the city sucking the life force out of any human or animal that crosses their path.
- Vampire Hunter D. In the 1985 film the three Snake Women of Midwich drain D's Life Energy by wrapping themselves around him.
- In the Marvel Universe, Selene is a "psychic vampire" who can drain the Life Energy of human beings into herself. If she drains the victim's entire life force their bodies crumble into dust. She must drain life force on a regular basis to renew her vitality and youthful appearance. She can use absorbed life force to enhance her physical strength, speed, stamina, agility, reflexes, and durability to superhuman levels.
- Non-villainous example: Rogue of the X-Men has this due to her mutation, enabling her to drain Life Energy and temporarily borrow someone else's powers. Because of Power Incontinence, she can't touch anyone without draining their strength, which is understandably harsh on her social life.
- The wraiths on the Plains of Death in With Strings Attached feed off Paul's life energy—except he has so much that they explode from overeating.
- Doraku from A Growing Affection is a rather Affably Evil and polite man who outright explains to a captive Naruto, Sakura, Hinata and Lee that he falls under "enhance his power" from drinking blood (he insists that his demon clan aren't vampires but did inspire them) saying he gains whatever ability the person has. He never drinks someone to death though just tastes the blood and it works. Has the side effect of enslaving people he drinks.
- Lifeforce. The three space vampires drain Life Energy from humans to sustain themselves (and to store in their ship for future use during their long hibernations). The humans they drain become zombies who must drain Life Energy from other humans every two hours or be turned to dust.
- In Scanner Cop II, psychic 'scanner' Carl Volkin devours the lifeforce of other scanners to add to his own power. Staziak even compares him to a vampire at one point.
- In the X-Men movies, Rogue can do this through touch.
- In Hocus Pocus, the three witches do this to a young girl to maintain their youth.
- In Godzilla Final Wars, Kaiser Ghidorah could drain Godzilla's power with his bite.
Folklore and Mythology
- The Others in the Night Watch can collect the emotional energy of the Muggles and convert it into mana. In a twist, the nominally-good Light Others can only "feed" on positive emotions, whereas the "bad" Dark Others take away painful and unpleasant feelings.
- Should be noted though that in order to have emotions to feed upon, the Light Others foster positive emotions in their environment, whereas Dark Others foster negative emotions.
- This is expanded in later novels, when Anton finally figures out that the Others are parasites, and magic proficiency is determined by a person's own ratio of magic production vs. absorption. Humans produce more magic than they absorb, while the Others absorb more than they produce, allowing them to use it. The higher the absorption/production ratio, the more powerful the Other. Zero-level Others only absorb and can do anything they want with ease. This also means that being far away from humans (say, in orbit or on another planet) would render an Other powerless.
- In one book, a disillusioned Other wishes to turn every human into an Other using an ancient magical text. While the obvious problem with this is mentioned (i.e., absolute chaos), it is not mentioned that it would also drastically reduce the supply of magic in the world, making it almost impossible to cast spells.
- In the novels of Deverry, several of Rhodry's prior incarnations are unintentionally killed by their lover, a former air elemental who was transformed into something akin to a succubus by a Guardian. She used the drained energy to gradually make her manifestation form more human.
- Vardalek in Eric, Count Stenbock's True Story of a Vampire appears to be what we'd recognize as a psychic vampire, gradually draining the life from his prepubescent thrall.
- The weaponized variant of Vampiric Draining shows up in the Kull the Conqueror story "Riders Beyond the Sunrise," where Kull confronts his Arch-Enemy, Thulsa Doom. The sorcerer wields a sword that slowly saps Kull's strength and transfers it to Doom, allowing him to fight without tiring while Kull gets weaker and weaker. Disarming Doom and swapping his normal sword for the magical blade allows Kull to defeat the sorcerer.
- The dementors from the Harry Potter series.
- Elves in M.C.A. Hogarth's The Blood Ladders Trilogy keep human slaves in order to drain magic from them, as their immortality uses up more of their own magic as they age.
- The Fangire, and indeed most of the Demon Races seen in Kamen Rider Kiva.
- The Wraith from Stargate Atlantis feed on the life force of humans. Being fed upon by a wraith shortens the victim's lifespan, and produces Rapid Aging. It provides the Wraith with both bodily nourishment, and fuel for their Healing Factor. Notably, Wraith can also work this ability backwards, de-aging someone. They usually use both to "train" captive humans, eventually getting them addicted to the Wraith. This is how they control Wraith-worshipers, whenever it's necessary to use humans (e.g., infiltration).
- Classic The Twilight Zone episode "Queen of the Nile". A middle-aged actress named Pamela Morris is actually thousands of years old - she maintains her youth by draining the Life Energy of young men.
- The final season of Earth: Final Conflict introduces the Atavus, the original race that split into Taelons and Jaridians. Being away from their homeworld, they have to replenish their energy on a daily basis by feeding on sentient beings (in this case, humans) using their energy claws. The subject doesn't survive the process. The Atavus found that they really enjoy the feeding process. Their chambers allow them to create human/Atavus hybrids who also have this ability.
- In Supernatural, the djinn drain blood or fear from their victims.
- SCP Foundation: SCP Foundation SCPs 300 To 999, SCP Foundation SCPs 1000 And Beyond
- SCP-472 ("The Bloodstone"). Anyone who goes within 18 meters of SCP-472 will lose up to 1.35 percent of their biomass. It's implied in the article that it's somehow feeding on its victims by draining their blood.
- SCP-522 ("Blood-draining Carpet"). When a human being stands on the middle of the carpet, it will wrap itself around the person, insert thousands of hairs into the them and drain them of all of their blood in a few minutes.
- SCP-742 ("Retrovirus"): People infected with SCP-742 will drain the bone marrow from other humans. The stem cells in the marrow allow them to cease aging, and stem cells taken from fetuses allow them to create a SCP-742 filled fluid that they can infect into other humans in order to infect them.
- SCP-932 ("Night Feeder"). If the creatures are not fed they will attack people who are awake. This will so severely drain the victim that they will be rendered comatose and eventually die of a heart attack. The draining process has the side effect of allowing the creatures to reproduce.
- SCP-1448 ("LegendTripping"). SCP-1448 encourages people to perform rituals that shed blood where it lives. No trace of the blood can be found afterward, because SCP-1448 absorbs it.
- SCP-1529 ("King of the Mountain"). After SCP-1529 uses its Hypnotic Eyes to take control of a victim, it approaches them and drains their heat energy, causing them to die of hypothermia.
- SCP-1627 ("Mushroom Wars"). When a human being touches a SCP-1627-A, over the next two weeks the human will undergo Rapid Aging until death. This provides sustenance to the SCP-1627-A.
- Dungeons & Dragons
- The Cerebral Parasite and Brain Mole fed on psionic energy, which could kill their victim.
- The Will-o'-Wisp haunts places like bogs, swamps and dungeons where death traps like mires, quicksand and Pit Traps can be found. It tries to lure adventurers into those traps so it can feed on their fleeing Life Energy as they're dying.
- Not to mention actual vampires, who feed on both blood (Constitution points) and life force (negative levels), and Wights (weaker undead who drain life through slam attacks).
- The 3rd Edition spell Death Knell drains the Life Energy from a dying creature, killing it. Doing so increases your strength, your Hit Points and adds 1 to your Character Level for the purposes of spellcasting.
- There's also the classic 3rd level wizard/sorcerer spell Vampiric Touch which drains health points from the victim to replenish lost health.
- Original D&D Supplement IV Gods, Demi-Gods & Heroes
- In the Melnibonean mythos, the rune sword Stormbringer feeds on souls and Life Energy. The monster Quaolnargn consumes Life Energy. Vampire trees can send their leaves through the air to suck the blood out of their victims.
- In the Hyborian mythos based on Robert E. Howard's Conan the Barbarian stories, the Kraken feeds on human souls and Life Energy from its victims. The deities Tsathoggus and Yezud and the monstrous Vampire Gorgon of Akhlat all consume Life Energy. The vampire vine sucks the blood out of its victims.
- Dark Sun campaign setting. On the world of Athas the creature known as the thrax can drain all of the water out of an intelligent creature by touch. If it uses this attack on a human and the human survives, they may turn into a thrax themselves.
- Dragon magazine #238 article "The Return of the Wizards Three". The spell Scourge of Stars creates a magical whip that drains Hit Points from creatures it hits and bestows them on the caster. If the caster is injured the extra Hit Points heal those injuries first. If any are left over they heal any future injuries for the duration of the spell.
- World of Greyhawk Fantasy Game Setting boxed set (1983) "Glossography" booklet. In the adventure "The Lost Passage of the Suloise", the evil entity known as the Mother will drain the levels (Life Energy) of any creature inside its body.
- The Alu-demon drains Life Energy by touching a living creature. Each touch drains 1-8 Hit Points and cures 1-4 Hit Points of damage the Alu-demon has taken.
- Gygax magazine #3 adventure "The Marmoreal Dungeon of Garn Pat'uul". A vampiric cloud called a Horla can drain two Hit Points of Life Energy from all creatures inside its 15 foot diameter. Each two Hit Points drained heals 1 point of damage to the Horla.
- Shadowrun. Many Awakened creatures have the Essence Drain ability, which allows them to drain Essence (life/magical energy) in order to restore the Essence they lose due to their Essence Loss weakness.
- The Vampiric Bite and more generic Leech powers from GURPS.
- All Elohim in Demon The Fallen require Divine Faith to live and cast magic, and the only way the Fallen can obtain it is from humans, the image of God. For this, they can either reveal themselves to certain humans and let their Faith trickle to them constantly, or reap them for all their Faith in a one-time boost. Unlike vampires, demons don't actually expend Faith by merely existing.
- Space Gamer Fantasy Gamer magazine #7, article "Villains Finish First!". The super villain Vampire Prince of Darkness can use his power Drain Life Force on an opponent to weaken their soul.
- Mongoose Publishing's Strontium Dog RPG. The alien criminal Xen the Brainwraith enters a victim's skull, settles around the brain and exerts Mind Control over the victim. Each day it remains in the victim's head it drains a point from one of the victim's four physical characteristics (Intelligence, Strength, Endurance and Dexterity, in that order). When the victim's Intelligence is reduced to zero the victim becomes a zombie. When all four reach zero the victim dies. It has killed hundreds, if not thousands of people.
- This is one possible (though far from the only) use for the generic "Drain" power in the Hero System, which depending on precisely how it is defined can temporarily lower any characteristic or power and isn't hard to link with an appropriate Aid effect to the character's (or monster's) own. At least one earlier edition provided both effects in one convenient package via the separate Transfer power, but Sixth Edition no longer includes this; the Drain/Aid combination can model pretty much any desired effect along the lines of this trope with more flexibility, anyway.
- The Dark Eldar in Warhammer 40,000 work like this, due to the curse Slaanesh the god(dess) of pleasure put on them. Dark Eldar feed on soul energy, and one of the most effective ways to gain it is torture their victims in absolutely horrifying and unimaginable ways. They need to do this to keep themselves young, otherwise they'll rapidly age and die, and then fall into the clutches of Slaanesh who's in hell waiting for them.
- Lejendary Adventures
- The Peccant permanently drain the Health (Life Energy) of human and humanoid victims and add it to its own health.
- A Volitant Bruholak can do this too, but from any living creature.
- A Nosferatu can do this by biting a victim, but keeps the Health only temporarily.
- An Apparition can drain Speed (movement), Precision (dexterity) or Health by touch and temporarily add it to its own.
- The Shadowling can drain Health and add it to its Health/Free Will for one hour.
- Rolemaster Shadow World supplement Jaiman: Land of Twilight, adventure "Cult of the Third Moon". The Priestess of the title cult performs a human sacrifice ceremony at midnight in order to drain the Life Energy of the victim and maintain her immortality.
- Call of Cthulhu. Several Cthulhu Mythos creatures can drain blood.
- Byakhee can drain blood by biting a victim. Each round thereafter the byakhee will drain 1-6 points of the victim's Strength until it reaches zero and the victim dies.
- If a chthonian's tentacle hits a victim it inserts itself into their body and starts draining blood and other bodily fluids. This drains 1-6 points of Constitution per round from the victim. If a victim is hit by more than one tentacle each one drains 1-6 Con/turn. The lost Constitution cannot be regained. When the victim reaches zero Constitution it dies.
- When a Dark Young of Shub-Niggurath grabs someone with a tentacle, it holds the victim to its mouth and drains 1-3 points of Strength per round. The lost Strength cannot be regained.
- Shub-Niggurath drains victims with its mouths the same as its Dark Young, but drains bodily fluids at a rate of 1-6 points of Strength per round.
- After a star vampire grabs a victim with its talons it can bite and drain blood from it at a rate of 1-6 points of Strength per round.
- If hungry, Tsathoggua holds a victim against his body and drains 1 point from each of the victim's characteristics (Strength, Constitution, Size, Intelligence, Power, Dexterity, and Appearance. Each full month of hospital care restores 1 point to each characteristic.
- Early versions of the rules had regular vampires. Their bite could drain 1d6 Strength points of blood per round.
- Classic Traveller
- Journal of the Travellers' Aid Society #4. Since the Reticulan Parasite (based on the Alien xenomorph) doesn't eat the bodies of the creatures it kills, it's been speculated by biologists that it uses the victims' Life Energy to sustain itself.
- Judges Guild adventure Darthanon Queen. The randomly created Dyson monster could regenerate damage by absorbing the Life Energy of the humans it killed.
- Fantasy Games Unlimited's Aftermath. Vampires are human beings mutated by biological agents or radiation. They consume blood drained from captured humans.
- Gamma World adventure GW1 Legion of Gold. In the buggem lair, the parn embryots will jump onto victims' heads or shoulders, bite them and suck out their bodily fluids at a rate of 10 Hit Points per combat round.
- Carcosa: Weird Science-Fantasy Horror Setting. In hex 2107 a Spawn of Shub-Niggurath drains blood on a successful hit, doing 1 die of damage per round.
- It Came from the Late, Late Show. The Energy Form alien floats around draining the life force (Life Energy) of its human victims.
- Man, Myth & Magic Book III The Adventures Book, adventure "The Great Pyramid Revealed". While exploring the Great Pyramid in Egypt the PCs will encounter a room filled with rare underground plants called Indego Gentian. The plants use any creature that enters the room as food, draining both Power (magical energy) and Life Points (Life Energy) from them.
- Supplement Dorastor: Land of Doom
- A lamia drains Strength from a victim by biting them and Power by kissing them.
- When a succubus in female form has sex with a male she drains one point of Constitution from him.
- When a vampire bites its victim it doesn't just drain blood, it drains Fatigue as well.
- Gygax magazine #4 article "Djinn: Spirits between Heaven and Hell". All jinn can replenish lost magic points by draining the Life Energy of a living creature. Each point of Power in the victim yields two magic points.
- Supplement Dorastor: Land of Doom
- Arduin RPG, The Compleat Arduin Book 2: Resources
- Hellflash demons attack targets with bolts of electrical energy and devour the victim's soul when it dies.
- The Greater Demon Apharoe the Star Witch can drain the soul of a victim by kissing them for two consecutive melee rounds.
- The Greater Demon Sl'yth the Nightmare Demon can use its psychic powers to suck another creature's flesh off its bones and devour it. If the victim dies from this Sl'yth will also consumes the victim's soul.
- The Drich undead are evil beings that survive by drinking the blood and eating the hearts of living, sentient beings during a horrible ritual. Each victim sustains them for a week, so they spend all their time hunting down new ones.
- The Lich undead must drain the Life Energy of a sentient being at least once every 13 day Arduin lunar cycle or become unable to move (but it can still think).
- Rakshasha (sic) can rend with their claws and bite with their fanged jaws. While doing so they psychically drain and devour their victim's soul.
- Star Spiders are about 10-12 feet wide and long. Opponents that are sucked or pulled into their mouths are destroyed by heat and radiation at a rate of 51-100 Hit Points per combat round, which also consumes the victim's soul.
- Varanae generic RPG supplement Monstrum 1
- The Brain Mushroom drains spells from the mind of a spell caster (or 3-12 points of Intelligence from non-wizards) in order to survive.
- The Perygem is a living jewel from another dimension. When it touches another creature it can steal that being's soul, after which it returns to its own dimension. Once there it feeds on the Life Energy in the stolen soul at a rate of 1 level per week.
- Chaosium's supplement All the Worlds' Monsters Volume III
- Demon Spiders are the size of a large timber wolf and can cast webs that drain Life Energy from any creature they hit.
- A Leicht Geiste drains levels of Life Energy from any creature it touches. Each level it drains gives it an additional Hit Point.
- The Lifesucker is a large beetle-like monster with two 8-foot long tentacles that each drain one level of Life Energy on a hit.
- The Soul Stealer undead monster can drain 6 levels of Life Energy from a creature by touching it.
- The Red Spider drains its victim of one point of Constitution by hitting it with one of its claws.
- The Vamplock can drain 2 levels of Life Energy with its bite.
- The Great Wraith drains 2-5 Life Energy levels for each hit by one of its claws, has Telepathy and can regenerate 3 HitPoints per melee turn.
- SPI's Dragon Quest supplement The Enchanted Wood
- A dense fog will manifest an evil strangling mist that feeds on the Life Energy of creatures it kills to sustain itself.
- The PCs may be led astray by a glowing light that lures them into deathtraps. Once they're trapped the Will o'Wisp will return and touch them to drain their Life Energy as they're dying.
- Gorast, after exposure to Pit Mutagen. Not surprisingly, given her mosquito-like appearance.
- Also Krika, who had to drain body heat from living things to stay alive.
- Metroids, from the series of the same name, feed on life energy and leave their victims as dessicated husks.
- At least one specimen is able to inject energy into others, too.
- The True Ancestors, who go insane if they completely abstain for too long, but don't actually require it for sustaining their themselves; the addiction is a purely psychological.
- The Dead Apostles, however, require blood for physical sustenance, making them closer to the classical vampires in this regard.
- Rider from Fate/stay night, who is decidedly not a vampire, but rather a Gorgon (namely, Medusa).
- World of Warcraft's Blood Elves, who used to be able to suck the magic out of anything to sate their addiction to mana and keep from degenerating into "lost ones", they no longer possess this ability since their sunwell was restored. The Darkfallen, corrupted elves in the service of the Lich King, take this further by actually consuming blood.
- Venom needs to absorb his victim's energies in Ultimate Spider-Man.
- Darth Nihilus from the second Knights of the Old Republic game, feeds on the life energy of others through The Force to sate his endless hunger (since he has no connection of his own to The Force). He has done this to entire planets.
- The Dark Hand in Dark Souls uses the Dark Soul of the Undead to drain humanity in its grab attack. Can be used a limited number of times on NPCs, too.
- In Brain Dead 13, Vivi will do this to Lance if he doesn't make a choice of either a shave, manicure, or facial quick enough. And the result is downright unpleasant: though over in a split-second, we see Lance visibly shrivelled into a mummy-like state as a result of her appetite.
- Also, the ghosts with nooses around their necks will possess Lance and drain the living soul out of him!
- Dungeon Crawl has the Vampiric Draining spell, which is more of a life-force drain. It's one of the few renewable ways that Deep Dwarves can heal.
- In Endstone, Cole can do this.
- The creatures in the Shocking Horror arc of Breakpoint City (begins here) do this via spikes through the forehead.
- Earthsong: The 'vampire' species normally drink blood, but those with soulstone power can feed on life energy instead. This also means Tristram can invert this, channeling energy into people to heal them. He can also drain energy from plants instead of sentient beings.
- In unTouchable, modern vampires have learned to discreetly feed off humans' energy by touching them. It's relatively harmless but can cause temporary lassitude.
- In the Whateley Universe, this is one of Vamp's powers. If she draws too much energy from the victim (say, a mutant with Energizer powers) she tends to go bananas until it wears off.
- Jonny Quest TOS episode "The Invisible Monster". The title creature can drain the energy from a human body by touch, thus "consuming" the person.
- Given their fangs and Word Of God claiming they were based on succubi, it's very heavily implied the Changelings feed this way on My Little Pony: Friendship Is Magic. The show's time slot won't allow for any more details than "they feed on love", however.
- A Halloween episode of The Simpsons has Homer being attacked by a pair of vampires that suck out his blood, only for the two of them to grow fat and pass out due to also absorbing Homer's unhealthy high cholesterol and fat. Homer still turns into a bat after the fact.
- Vampire bats.
- Ticks, lice, fleas, mosquitoes, and leeches all drink blood, but are so small that they don't individually do significant harm (unless they transmit a disease).
- Also, bedbugs. They aren't vectors for any diseases, so at least they won't cause a disease outbreak. But infestations tend to be persistent. They're astoundingly hardy, seem to actively prefer humans, can go for months without needing to eat, and can leave thousands of annoying, scratchy bites all over you. There is a reason why most landlords tend to put some sort of clause in the new lease stating that you'll be held financially accountable for an infestation if it can be traced back to bugs that came with you.