Shadowmoor is an expansion set released on May 2nd, 2008 for Magic: The Gathering. Shadowmoor is the first set of the new "Shadowmoor" block. This set includes 4 new mechanics; Conspire, Persist, Untap and Wither.
combining this with deus of calamity is a bit of a no-brainer...that doesn't make it any worse though. 16 damage and two lands per turn...reminds of me of a numot, but on steroids or something...watch out for these in any green/red deck.