Abel's always had some determination for Griffins. If it weren't for the diplomatic relationship between the duchy of St. Ellis and the duchy of Carmel, he would've gone to steal Griffins from King Ambrose a long time ago.
Now, with the information put before him, he was starting to have thoughts where he could take all ten Griffins as his own. As the humans would have it, anything that's taken from the orcs belonged to the ones that snatched them away in the first place. The rule was absolute. As long as he was the first one to retrieve them, even the Kingdom of St. Ellis would have no choice but to leave them to him.
As for the Orc Empire, Abel actually didn't care. The Orc Empire was in shambles now. Besides, King Ambrose was furious at the moment. He'd been spending a huge amount of gold to call for a genocide of the orcs. If anyone should be afraid, it should be those that tried to attack Prince Horace in the first place.