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NOTE: For the DreamWorks Animation version of this character, click here.

We are all in a sense supper. Walking, talking, breathing suppers, that's what we are. Take you, for instance. YOU are about to be eaten by ME, so that makes you supper. That's obvious. But even a murderous carnivore like myself will be a supper for worms one day. We're all snatching precious moments from the peaceful jaws of time.
~ The Green Death to Hiccup Horrendous Haddock III.

The Green Death, also known as Merciless, is the main antagonist from the first book of the How to Train Your Dragon book series and a posthumous antagonist in the other books.

He is a Seadragonus Giganticus Maximus who wanted to devour every Viking on Berk, including Hiccup. He was also the leader of the first Dragon Rebellion and came into conflict with Hiccup the First.


How to Train Your Dragon

In the first book, the Green Death arrives on Long Beach with a smaller Seadragonus Giganticus Maximus (which he eats later on). Hiccup is sent to meet with him and asks if he comes in peace or war as he is the only one who can speak Dragonese.

When Hiccup says his name the dragon shivers subconsciously he seems however that Hiccup did not notice it nor did the Green Death itself. The dragon says he comes in peace but that he's still going to eat them all regardless. The Green Death and Hiccup discuss Singing Suppers, but during the conversation the Green Death moves in to eat Hiccup.

Just as this happens the Green Death yawns, and decides he is too tired to eat Hiccup right now, stating that he should come back in a few hours to be eaten. Hiccup then leaves and tells the tribe that the Green Death, while coming in peace, will still eat them. With the help of the other Hooligan and Meathead boys and their dragons, Hiccup creates a plan to kill the Green Death with the help of a second Seadragonus Giganticus Maximus, the Purple Death, which they trick into helping them.

In the following battle, the Purple Death is killed. However, the Green Death is fatally wounded. In anger, the Green Death swallows Hiccup whole. Fortunately, Hiccup avoids being digested by grabbing and holding on to a Roman spear stuck in the dragon's throat. While inside the Green Death, Hiccup discovers the fire holes (a dragon's source of fire) and blocks them with his helmet. Due to this, the Green Death blows up when he tries to burn Stoick, Hiccup, and Toothless. His death makes Hiccup a hero in the eyes of his tribe.

How to Steal a Dragon's Sword

In "How to Steal a Dragon's Sword" flashback, the Green Death was known as Merciless, the leader of the Dragon Rebellion in Hiccup Horrendous Haddock the First's time. Merciless saw in the future that he was to be killed by a human named Hiccup Horrendous Haddock III. He sent Wodensfang to kill Hiccup Horrendous Haddock III, but was instead betrayed by Wodensfang when Wodensfang discovers the good in Hiccup's heart. With the Dragon Jewel, Hiccup ordered Merciless to disband the Rebellion and become a loner.


Green Death appeared as a gigantic "gob-smackingly vast" green dragon, as his name suggests. He comes off more like a mountain than a living creature and dwarfs a Tyrannosaurus Rex. His teeth are 20 feet long, which would make his estimated size 990 feet long. He is covered in barnacles as a to form a natural armour. His scales are a dark green - the color of the ocean. His fire is green.


An incredibly evil dragon, he seeks to wipe out humanity. He is quite fearful of Hiccup due to seeing his future death at the hands of a Hiccup. He enjoys devouring everything he comes across, from humans to other dragons. He is very sadistic, enjoying playing with his food and taking pleasure in the terror Hiccup and Stoick have of him. He views himself as a philosopher who states him devouring those smaller than him is the "way of the world". He kills others for fun or for petty reasons such as being "full of [themselves". He is very prideful, risking a deadly battle with another Seadragonus Giganticus Maximus due to believing the latter had belittled him. He was also very vengeful, such as how he tried to kill Hiccup after the plan to kill him.



  • The Red Death was greatly inspired by the Green Death. Their change in name is likely a reference to their different fire colors.

External Links


           How to Train Your Dragon logo.png Villains

Outcast Tribe
Alvin the Treacherous (DreamWorks) | Excellinor the Witch | Mildew | Savage

Northern Alliance
Drago Bludvist | Drago's Bewilderbeast | Eret | Warlords | Grimmel the Grisly

Dragon Flyers
Krogan | Mr. Murderous Pile of Yak Dung | Flyer Leader

Berserker Tribe
Dagur the Deranged | Chief Berserk | Savage

Dragon Hunters
Johann | Viggo Grimborn | Ryker Grimborn | Cleve | Ingar Ingerman | Dragon Hunter Commander | Fight Master

Green Death | Purple Death | Furious | Venomous Vorpent | Red Death | Toothless' Nemesis | Frozen Skrill | Screaming Death | Firecomb Crasher | Hookfang's Nemesis | Drago's Bewilderbeast | Grimmel's Deathgrippers | Slinkwing Trio (Lurke) | Fault Ripper | Thunder's Nemesis

Fat Consul | Kidnappers | Norbert the Nutjob | Hairy Scary Librarian | Snotface Snotlout | Amos | Calder | Gruffnut Thorston | Magnus Finke | Waldondo del Mundo | Erik the Wretched | Svetlana the Sly