Twas long time ago... in the time before the time... Well not that really long. In fact, it was back in time when Famine was only a 3 years old toodler. Since "age" is nothing to them, Famine was mature enough and had enough power and movility. The young black rider found himself strolling on some forest and found a wounded 3 years old dragon hatcling. His skull nearly split open and a pair of demons debating on how to use him.
Famine immediatelly reacted killing the demons and making a golden and silver plaque cover the dragon's wound. Unfortunatelly the body was so weak by now that, without even knowing it, Famine's body absorbed the dragon's body and soul to prevent him dying. The young hatchling thankful for this became the Rider's First mount (By that age, Famine was not given Desolation yet) and best friend.
Also, by fusing their bodies the Horseman became a dragon hybrid able to change to this dragon form. Simply known as "Dralion form/mode" Famine can fly really fast (nearly the speed of light if he desires to), has the ability to firebreathing and also can mix his own powers giving this form the power over fire and Ice, plus, the strenght it gains it's amazing and uncomparable. His fangs can inject poison and his scales are as sharp as edged metal plaques and though his claws are reduced compared to his original form claws, these can cut through even Uru (careful Red Nidhogg, not even your armor could protect you) and wouldn't have a hard time scratching Sionia, the most powerful material known in this and any universe (Stronger than Adamantium, Uru... name it... is stronger). Add to that the sharp hook-like tail and you have a demolition machine that would hardly go down nor break a sweat.