Is that a bull? A frog? It's Niuwa!

Niuwa - Meaning cow frog. A cow sized creature, musculature like a bull, but covered in a skin like a frog, can go on land, but mainly resides in the water near swamps, colours are more plain compared to the frog family, but this is a warning to other creatures, those horns will be used if necessary. Due to the fact that this Niuwa was used as a slave in a farm. The nose ring came about when his strength grow and become uncontrollable, and the ring was an attempt to keep him at bay. However, this Niuwa escaped before they can put a rope in the ring.