I've never heard of him eating the heart of one of his enemies, and I feel like that would have been mentioned.
Of course we never saw him die in glorious battle, but as an ambassador I doubt he'd get the opportunity. A coward's death is likely.
Doesn't seem like he'd make it into Sto Vo Kor, unless someone won a great battle in his name. Everyone knows that's the wimp's way into Sto Vo Kor though.