Yes, it costs a buttload of mana, but seven mana for a Green deck is reasonable
You can face trouble with so many low-health characters as one Grab Your Swords can eliminate most of your board but its uncommon at best
It would also kill any random big creatures he had like the Lyra I saw or even an Angel of Sanctions
aggressive decks, Deaths Shadow easily looses against flying Murktide Regents or blocking Construct tokens from Urzas Saga while Prismatic Ending and Solitude represent strong answers as Swords to Plowshares effects so the life loss as a build up for Deaths Shadow doesnt pay of anymore
The set, which is over a year old now, was the fourth released, and contains 204 cards
Still, if theres a powerful aggressive deck, or even a good vampire-type one, this card will be there