Black Horn

[Fancy name here]
A medium size bipedal wyvern that expends most of it's life close to grass fields, where it can easily find food from the cattle of many farmers.
It's most noticeable features, and also the reason for it's nick name is the black color on it's horns and scales extensions.
Just like sharks the Black Horn is constantly changing it's teeth, making the teeth have irregular sizes for the elders (extremely territorial/constantly fighting) than the youngest ones.
It's diet consists of: deer, wolf, cows(as mentioned before)and other small mammals.