The Snaptrapper is a Mystery Class dragon released on October 23rd, 2015. They were formerly 1,000 gems (800 for members) but have reduced to 750 gems (600 for members).
From the How to Train Your Dragon Wiki:
- "With triple-split jaws on each of this Mystery Class Dragon’s 4 heads, it looks like a man-eating Venus Flytrap, just not as friendly."
For more information on the Snaptrapper, visit here.
In the quest Multi-head Bonanza from the Battle for the Edge expansion, the player meets a wild Snaptrapper on Zippleback Island, and can watch it ambush-hunting a spider.
Fishlegs explains that Snaptrappers and Zipplebacks probably have a common ancestors, but they changed their morphology over time due to a difference in diet. Snaptrappers eat small animals, and set ambushes while hiding in burrows. For this reason they are not dangerous to people. The four heads of the dragon probably help it to cover more ground while it lays for ambush.