The Bones of a Finned Dragon

Type Fossil
Rarity 💎
How to discover A dragon that can swimA dragon that can swim
The bones of something like a huge lizard from the head to the body, but with fins for hands and feet like a sea turtle. It's about 2m in length, and has changed into something like stone. With it's fins, you'd expect to find it in the sea or in a lake. So why was it found on land?