Oh, are we to name cards now? Sorry, I misinterpreted your post. Last time I wasn't really positive about Alara, I think Conflux is even worse. There are nice cards, but it doesn't really feel like a set. Apparently there's a big story behind the set, but I'm not really into third-grade fantasy books. But Nicol Bolas is the main villain in the book and he's in the set, so I think that card could be a contender. Nicol Bolas sure has flavor, however his card doesn't tie in with any of the set's mechanics. At least Sarkhan Vol makes dragons, which makes some sense in the Jund shard.
So, what else is there? Euh, Progenitus, it showcases all colors in it's casting cost, and, well, nothing. Perhaps Sigil of the Empty Throne tickles the casual player's fancy, but it doesn't tie in to the set. Knight of the Reliquary is a nice card to build a deck around, and it enables other cards in the set. So yes, why not stick with Knight of the Reliquary...
This set sucks.