The Krylock Demon is a fictional creature from the animated series American Dragon: Jake Long. It was a beast of pure evil which feeds off of magical creatures, such as Unicorns[1]. It had the head of a cobra and the body of a scorpion. It was also inter-dimensional, meaning that it lived in another dimension. The only way it could come to Earth is if it passed through a dimensional door, which could pop out anywhere at anytime. Because of this, it was impossible to track.

Its home was a wasteland of lava and rocks, possibly the interior of a volcano or a place similar to the Underworld.


The Krylock's scorpion-like tail was where the demon stored its venom. When extracted, it would come out green in color and have a slight glow.

This kind of venom was, according to Fu Dog, a key element to making a successful portal spell, and indeed, if the poison was omitted or replaced with another substance (such as vanilla), the spell would only create a useless, dead-ended dimensional door.

Haley Krylock

An example of the venom's effects

If consumed by humans and Dragons, the venom would infect those who ingested it by giving them Krylock properties. In most cases, victims would grow fangs, a slithering tongue, pincers, a scorpion tail, sometimes even scorpion legs, and their eyes would become reptilian like those of a snake. They would also gain super strength and start a rampage out of savagery.

Because they are under a magical influence, those who consumed some of the Krylock venom could be defeated the conventional way. Since the poison's power came from the beast itself, it was necessary to first slay the Krylock to avoid harm upon the victims. Once the Krylock was defeated, its venom's effects would disappear, turning everyone who was affected by it instantly back to normal. The victims would also have no recollection of ever being under its influence.

Ironically, the Krylock's demise was its own venom, driven through its heart from its scorpion tail by Jake.



  • The Krylock Demon was one of the Top 13 Threats to the Magical Community.
  • The Krylock was apparently so evil that even its hologram would try to attack people (like Spud). It was even shown eating a harmless Leprechaun in a single bite;
  • Victims of the Krylock poison would still have the ability to talk, though most would just hiss and roar.
  • When infected by the Krylock's poison, Haley was seen spitting some green and glowing goo that burns through a picture frame like acid. It was unclear if this was a Krylock ability or just an effect of its venom.
  • One victim of the Krylock venom developed a tongue with a secondary mouth, a reference to the creatures showcased in the "Alien" movies that have this same property.
  • Although the Krylock lived in a world of lava, it was vulnerable to fire.
  • According to Spud, the Krylock was a male.
  • Unlike most magical creatures, the Krylock was a made up creature in the show, like the Avemetrus, the Shade Demons, the Moss Monster, etc. The other magical creatures like Unicorns, Pixies, Trolls, and Leprechauns are actual creatures that are legendary in the show and real-world.


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Television: American Dragon: Jake Long"Morpholomew" (Lilo & Stitch: The Series crossover episode)

Books: The Dragon HunterThe Gnome Eater
Games: All Star Skate ParkRose's Print ShopDangerous DescentJake's Dragon Tile ComboJake's Inferno PinballThe Huntsclan TrapsHigh Risk RescueAmerican Dragon: Rise of the HuntsclanAmerican Dragon: Jake Long: Attack of the Dark Dragon

Main Characters: Jake LongRoseTrixie CarterArthur SpudinskiLuong Lao ShiFu DogJonathan LongSusan LongHaley Long

Other Characters: Brad MortonHans RotwoodStacey WintergrinTraceyLaceyOlivia MearsCourtneyJasmineMarnie LockjellyDanika HunnicuttNigel ThrallFred NerkKyle WilkinsGregorySilverCarol St. CarmineFrederick ButtersleevesJoshuaTrishaAunt CathyRose's ParentsSara and KaraThe Dragon CouncilCouncilor AndamCouncilor KuldeCouncilor KukulkhanCouncilor OminaPatchouli LongSun ParkDolores DercetoMs. JenkinsMs. McGuireMs. BirchMrs. CarterColonel Hank CarterMs. SpudinskiOfficer MortonVeronicaBrocamasStan LipkowskiBerthaReggie the BrownieClooneySanta ClausJaren MacArthurShaniqua ChulavistaThad Rochefort-ChaiseJasma SancereRon SlamCoach SackersonJudge Glamis CutlerTommy KingThe Witches of WoodstockJack FrostPix McGeeQueen LilianaStrigoiMister KrunkersBennyPetite Messenger FairyHerbert the Goblin
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Guest Characters: Monty HallIngrid Third

Season One: "Old School Training" • "Dragon Breath" • "The Talented Mr. Long" • "The Legend of Dragon Tooth" • "Act 4, Scene 15" • "Adventures in Troll Sitting" • "Fu Dog Takes a Walk" • "Professor Rotwood's Thesis" • "The Egg" • "The Heist" • "Dragon Summit" • "Body Guard Duty" • "Shapeshifter" • "The Ski Trip" • "The Long Weekend" • "Eye of the Beholder" • "Jake Takes the Cake" • "Hong Kong Nights" • "The Halloween Bash" • "Fu and Tell" • "Flight of the Unicorn" • "Keeping Shop" • "Ring Around the Dragon" • "The Hunted"

Season Two: "Bring it On" • "Half Baked" • "The Academy" • "The Doppelganger Gang" • "Something Fishy This Way Comes" • "Breakout" • "Family Business" • "Hero of the Hourglass" • "Dreamscape" • "A Befuddled Mind" • "Fool's Gold" • "Feeding Frenzy" • "Haley Gone Wild" • "Supernatural Tuesday" • "The Rotwood Files" • "Hairy Christmas" • "Switcheroo" • "The Love Cruise" • "Year of the Jake" • "Homecoming" • "Young at Heart" • "Siren Says" • "Shaggy Frog" • "Nobody's Fu" • "Magic Enemy Number One" • "A Ghost Story" • "Bite Father, Bite Son" • "Game On" • "Furious Jealousy" • "Being Human" • "The Hong Kong Longs"

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