The Scauldron is a Tidal Class dragon that can be purchased for 750 gems (600 for members) from the store.
From the How to Train Your Dragon Wiki:
- "Instead of breathing fire, Scauldrons have the ability to scald their victims. This ability comes from sucking in seawater, heating it in their cauldron-like stomachs, and then blasting their next victim with extreme force and heat. This is how they got their name. One hit from that hot water will finish off most enemies.
- "If you want to train a Scauldron, the best way to start is simply to cover yourself in water. Scauldrons are sentimental creatures who love anything that reminds them of home. They also like anything that smells like fish."
For more information on the Scauldron, visit here.