This is just an idea I had- it's a mixture between a Unicorn, Lion, Boar, and mule. They are very strong, extremely hot-tempered and impulsive, and yes, very stubborn in their decisions once they make them, though they do tend to be somewhat lazy.(They get that from the lions' blood)They are also suprisingly graceful, agile, and the tails are quite lethal, they have 9 barbed poison spines that shreds the skin and lets the poison seep in- it is like a constrictor snake, it can squeeze a person to death. All of this makes them quite formidale opponants. I use these a lot in stories and roleplays-only my House breeds them.