Well the upkeeps on those the Elder Dragons are nasty. But the thing is that the casting costs on those things are quite a bit more of an issue usually...
But the problem here I don't know...
It just seems like in order to use it, the entire deck has to be based around it mostly...
And in order for the cards in the deck to be effective, Hub has to be out...
Hub isn't out at the beginning of the game, so until the Hub hits, those cards are dead weight or sometimes worse...
But my hope is for Ancestral Knowledge with it, which still stands a chance at breaking Hub if used properly. Parallax Tide is another good one, breaking the opponent for an easy win against many decks if Hub is on the table...
So right now that is what I'm thinking of working with, although I haven't given it much thought really...
Black might also work, since black has some nice stuff, but monoblue is most promising, IMO...