In The BooksEdit
In How To Speak Dragonese, Alvin the Treacherous had slipped a Venomous Vorpent inside Hiccup's "How To Speak Dragonese" book as a trap. This, however, was before Hiccup became a "god" and hovered in the air. Alvin attempted to remove the dragon before he gave the half of the book back to Hiccup, but Hiccup snatched it from him too quickly. At one point on the hot-air balloon ride out of Fort Sinister, Hiccup was stung by the Venomous Vorpent. The dragon drops out of the story at this point, though it does appear (as an illustration, with words written around it) in the epilogue, stating "I don't like happy endings. They are too neat, too nice. I like a little spice in my stories," implying that one of the three had been stung by it. In How to Cheat a Dragon's Curse, it is believed to be Fishlegs, but it turns out to be Hiccup.
The only cure for a sting from the Venomous Vorpent is potatoes! You will not feel the bite because it numbs you before it bites you.
- The Venomous Vorpent is a close relative to the Sand Rattler.