you have a lot of 5 mana cards in your curve. that's pretty dangerous to get stuck with 1 or 2 of those... but only having 20 lands. standard is 24 lands and you're mixing colors. so you should find yourself in more trouble than not trying to get those high cost cards out of your hand. using dragon's claw or any other artifact like that is not a good idea for a multi-color deck. the best time to use that is when you have red... and so does your opponent. other comments... you have a pretty wild format mismatch. if you're looking just for fun - i'd suggest you buying the Knights vs. Dragon's Duel Deck.
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