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The Monstrous Nightmare is one of the most aggressive, powerful, and stubborn breeds of dragon known to Vikings. Until the Red Death was discovered, it was considered the most formidable dragon species.

Background[]

No dragon is more ferocious, or feared than the Monstrous Nightmare. This gigantic dragon has a long, snakelike neck and tail, and is covered in red scales and long sharp spines. The Nighmare's gigantic head and mouth can swallow Vikings whole. This dragon can attack any time of the day or night, from the air or on the ground. It is highly aggressive, and will never run from a fight. Its fire is thick and sticky, clinging to walls and running down hills like a flaming river. The Nightmare also has a nasty habit of setting itself on fire.

In How to Train Your Dragon, one is used as the last initiation test for the young Vikings before the Vikings befriend the dragons. While in the books, they are described as being the size of a leopard, in the film they are portayed as much larger. Despite their vicious nature and fierce combat abilities, it is shown that a Night Fury can defeat it through a brief but brutal fight.

Personality[]

A Nightmare is usually purple, scarlet, or green and possesses a long, snakelike neck and tail. Unlike some other breeds of dragon, it has no forelegs, and its ground-based locomotion is similar to that of pterosaurs and bats; it can use its claw-tipped wings to "crawl" along the floor.

Despite their name, Monstrous Nightmares are known to have a softer side. In Dragons: Wild Skies, their favorite food are scented flowers. In several points of Dragons: Riders of Berk, Hookfang occasionally dozed off and was distracted by butterflies.

Fighting and Tactics[]

As it is quick to anger, the Monstrous Nightmare can be counted on to be the first to arrive and the last to leave in a fight. Its signature attack strategy, known as the "Fire Jacket," is to engulf itself in flames (according Snotlout, by igniting spit it coats itself in prematurely), resulting in an intimidating offensive and defensive maneuver similar in appearance to napalm or other gel-based incendiaries. This dragon also has powerful jaws, sharp teeth and talons like meat hooks. It can also use its tail as a club.

According to Gobber the Belch, the best way to engage a Nightmare is to clamp its mouth shut, leaving it unable to open its enormous jaws, much like a crocodile (however, the rest of the dragon is free to do whatever it wants). In Heather Report Part II, Snotlout revealed that the Monstrous Nightmare enjoys its horns pinned to the ground, and Astrid was able to tame one by doing so.

By nature, the Montrous Nightmare is fearless and proud. Nightmares are some of the strongest dragons around and they know it. The best way to earn the trust of a Nightmare is simply to show it the respect it deserves. Placing a gentle hand on its snout and showing you are not a threat to it is the best way to go.

Gallery[]

Navigation[]

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How to Train Your Dragon logo
Media
Films: How to Train Your Dragon • How to Train Your Dragon 2 • How to Train Your Dragon: The Hidden World • How to Train Your Dragon (2025 film)

Shorts: Legend of the Boneknapper Dragon • Gift of the Night Fury • Book of Dragons • Dawn of the Dragon Racers • How to Train Your Dragon: Homecoming
Spin-off series: DreamWorks Dragons (Episode List) • Dragons: Rescue Riders • Dragons: The Nine Realms
Video games: How to Train Your Dragon

Characters
Film Characters: Hiccup Horrendous Haddock III • Astrid Hofferson • Stoick the Vast • Valka • Gobber the Belch • Fishlegs Ingerman • Snotlout Jorgenson • Ruffnut Thorston • Tuffnut Thorston • Eret, Son of Eret • Gothi • Spitelout Jorgenson • Drago Bludvist • Grimmel the Grisly • Warlords • Zephyr and Nuffink

Spin-off Characters: Dagur the Deranged • Mala • Heather • Heather's Parents • Atali • Gustav Larson • Minden • Bucket • Mulch • Silent Sven • Trader Johann • Alvin the Treacherous • Viggo Grimborn • Ryker Grimborn • Mildew • Captain Vorg • Krogan
Dragon Characters: Toothless • Stormfly • Meatlug • Barf and Belch • Hookfang • Cloudjumper • Skullcrusher • Grump • Red Death • Toothless' Rival • Scauldy • Windshear • Shattermaster • Torch • Light Fury
Dragon Species: Night Fury • Deadly Nadder • Gronckle • Monstrous Nightmare • Hideous Zippleback • Typhoomerang • Thunderdrum • Hotburple • Fireworm • Scauldron • Whispering Death • Smothering Smokebreath • Changewing • Screaming Death • Fireworm Queen • Flightmare • Skrill • Lead Stinger • Speed Stingers • Stormcutter • Timberjack • Snaptrapper • Terrible Terror • Boneknapper • Bewilderbeast • Seashocker • Razorwhip

Songs
How to Train Your Dragon: Sticks and Stones

How to Train Your Dragon 2: For The Dancing And The Dreaming • Where No One Goes • Into A Fantasy
How to Train Your Dragon: The Hidden World: Together From Afar

Cast
Films: Jay Baruchel (Hiccup) • America Ferrera (Astrid) • Jonah Hill (Snotlout) • Christopher Mintz-Plasse (Fishlegs) • Kristen Wiig (Ruffnut) • T. J. Miller (Tuffnut) • Gerard Butler (Stoick) • Craig Ferguson (Gobber) • Cate Blanchett (Valka) • Kit Harington (Eret) • F. Murray Abraham (Grimmel) • David Tennant (Spitelout)

Shows: Chris Edgerly (Gobber) • David Faustino (Dagur) • Alfred Molina (Viggo) • Mark Hamill (Alvin) • Adelaide Kane (Mala) • Edie Mirman (additional voices)

See also
Locations: Berk • Itchy Armpit

Objects: Hiccup's Shield • Inferno • Dragon Eye • Dragon Eye II
Crew: Dean DeBlois • Chris Sanders • Bonnie Arnold • Alessandro Carloni • David Soren • Jennifer Yuh Nelson • John Powell

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