So looking at the sagas, I think that the best one to include in an EDH deck with him are probably the white ones (Especially History of Benalia and Triumph of Gerrard), though Song of Freyalise would help cast this guy. None of the red ones seem useful for the type of deck you’d want to build around this guy.
It’ll take all five colors and Rockhoof repeatedly smacking your opponent upside the head, but yeah, the synergy’s there.
I see combo potential