While it's possible that I'm underrating Kinsbaile Cavalier, my guess is that it's more of a fun card for casual Knight decks than something that will be a part of more competitive Knight decks (although I do think Knights will probably be a solid aggro option in Historic)
Blue is a great way to draw cards, of course, but its also got some interesting token-making, like The Bears of Littjara
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It is one of the many prize cards that allow you to win the match by attacking with a specific monster (in this case Pendulum)
If you're looking to overwhelm the table, this enchantment does all the heavy lifting