Or at least, thats how it works on the face of things
You can take a look at our Mastery article for more info on level progress and level mastery
While the cost is still three to attack, it only requires one of those Energy to be Water
The first four sets will rotate out of the Core Constructed format, but will still be available to play in a new format, called Infinity Constructed
Finally, we have Expedition Map exclusively to search for Urborg, Tomb of Yawgmoth or Cabal Coffers, to have this duo on board and create countless mana, which will allow us to end the game in a gigantic Torment of Hailfire
Nothing sweeps a battlefield better than Terminus, and no card is better at dealing with a single creature than Swords to Plowshares