Note that while the site says there are 75 cards, it's a 60 card deck with a 15 card sideboard. Also, this is a Pauper deck, which means it was made using only cards that were printed at common.
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Terror prevents regeneration, although you're right that Doom Blade can take out artifact creatures. Whispersilk Cloak was actually common in its first printing. http://www.mtgvault.com/ViewCard.aspx?CardName=Whispersilk+Cloak&Edition=DST I'm thinking I may sideboard two copies of Relic Putrescence, and add in Nature's Claim.