Slumbering Dragon - Rare
Creature - Dragon (Rare)
Slumbering Dragon can't attack or block unless it has five or more +1/+1 counters on it.
Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Slumbering Dragon.
Revealed today in an article by Adam Styborski on DailyMTG.com, Slumbering Dragon grows as fast as your opponents attack you, however it can't attack or block until it "awakens" with five +1/+1 counters on it.
Slumbering Dragon can quickly become an 8/8 flyer with when played in the first few turns of the game. Control decks packing board sweeping spells such as Devastation Tide or Terminus will laugh at Slumbering Dragon. On the flip side, Slumbering Dragon may be a problem for quick and aggressive decks that are light on removal. Do they attack now, or wait for a larger threat? While they may be Pondering what to do, you'll be building your board state.
With other awesome and efficient dragons like Thundermaw Hellkite and Moltensteel Dragon running around, Slumbering Dragon has some work to do if it wants to get in the spotlight.
One idea might be add Slumbering Dragon to a deck running green spells like Increasing Savagery or Travel Preparations. White allows us to cast Travel Preparations for its flashback cost while giving access to Mikaeus the Lunarch. In a "god hand" you'll be able to play Slumbering Dragon on the first turn and then cast Blessings of Nature on turn two for its miracle cost. Slumbering Dragon will just need one more +1/+1 counter before it can attack. Worst case scenario, a Ring of Valkas will help Slumbering Dragon slowly get up out of bed.
Boston Magic the Gathering Examiner