This is a mystical beast I drew awhile ago. It's kinda like a fusion of a dragon and a snake with bone spikes (head looks more like dragon and has a snake body ie no wings/legs/arms etc). It's called Myrrormr, which is old norse for swamp serpent.
They are very ficious and dangerous and can easily drag you down beneath murky waters if you are not careful or even choke you to death while piercing your body with its spikes. The bone spikes are its natural defence.
They are often seen in/around freshwater swamps (
http://en.wikipedia.org/wiki/Image:F...sgov_image.jpg)
because it seems to be easier for them to adapt in suchs terrain because they are quite cold blooded. They can move freely both in water and on the land. Kinda like alligators, need air to breathe but still enjoy being in the water and can move into land when looking for prey.
Their life span is not certain but people estimate them to be able to live even up to 30 years, though they seem to stop growing after they become adults. People claim to have seen a Myrrormr that was a little longer than 5 meters, though they normally appear to be around 3 meters long.
How they reproduce is unkown, no one has seen the creatures mate or laid any eggs, in fact it is believed that they are all males. The rumors or myth if you will, also say that they are offsprings of some kind of wyvern and snake creatures juding from their appearance.
They are preditors and are not very picky in their choice of food, as long as it's meat. They prey on most types of animals in the area or even fish if they are desperate. It's believed that they have to eat around half it's body weight each day.
They are also very protective about their territoriums, even against their own kind since they rarely live together.
They are more comfortable during night and that's the time they normally go out to hunt. Even if they have the appearence of a snake they are not venomous, their sharp teeth and defensive bone spikes seems to be their result of evolution and have no need for venom. Their body can easily be pierced by a sharp blade since they don't have hard scales like dragons and might be the reason for their bone spikes to protect them from harm. Though they are very fast and can strike in a instant.
Their movement is somewhat faster in water, thus one reason why they prefer to be in water but they can still catch up to human speed on land. Against faster animals they tend to sneak up/lurk until they can get them by supprise.
They can see better in the dark than during day, thus why they normally hunt during night. They see better on land than underwater, which is also one reason why they hunt on land, another is that there are more animals on land which they prefer to eat. They are deaf but if their vision fail to locate the presence of other beings they can locate them with help from vibrations on the ground. They don't have a snake's tongue and they can't sense heat.