Old barbarian riding a tyrannosaurus across forested plains

A high fantasy style image of a tough, mighty old gray beard barbarian riding on a huge tyrannosaurus through a vast forested plain. the barbarian has a big fluffy white beard and old, strung muscles. The barbarian has a battle axe in one hand as he rides the great dinosaur. Done in a colorful and dymanic style of the fantasy masters of Frank Frazetta and Simon Bisley