This guy is more easily explained by my other skin, Meadow!
One of the last Medieval dragons who was born in 1400, sat around for 100 years (until 1500, that is) until he realized the Medieval Ages were over and the Renaissance had started, so he decided to take a little nap in an icy cave he found up in Siberia. How long did that nap last? 500 years. Over that "little" nap, his body sorta shifted into some little furry dude. If you wanna think of the "original" Vexatus, think of an Eastern Dragon and give it the same fur palette as this.

Vexatus Minecraft Skin