Being scared is for scaredy eggs!
— Cera trying to convince herself to not be afraid while fleeing the dragon
A dragon (or wyvern) appears during the episode, The Spooky Nighttime Adventure, during a dream sequence.
The dragon only appears in one scene, during a nightmare being experienced by Cera. It harasses the young Threehorn, blasting fire at her and chasing her. It disappears after Cera fearfully declares that she "is not a scaredy-egg", and she thinks she is safe until visions of her friends start to terrorize her next.
- According to the storyboard for The Spooky Nighttime Adventure, the dragon is part "pelican-mouthed T. rex eater", part Hidden Runner, and part dragon.
- This dragon also bears resemblance to the Prehistoric Dragon seen in the 2004 Animal Planet/Channel 4 docufiction, The Last Dragon (known as Dragons: A Fantasy Made Real in the United States).
- Its roars sound similar to those of Zilla from the 1998 film, Godzilla, and its spinoff animated television series.