Academy Ruins
Arid Mesa
Badlands
Bayou
Blood Pit
Bloodstained Mire
Bojuka Bog
Breeding Pool
Emeria, the Sky Ruin
Exotic Orchard
Flagstones of Trokair
Flooded Strand
Forbidden Orchard
Forest
Godless Shrine
Hallowed Fountain
Island
Karakas
Kor Haven
Krosan Verge
Lavaclaw Reaches
Library of Alexandria
Llanowar Reborn
Marsh Flats
Maze of Ith
Misty Rainforest
Mountain
Murmuring Bosk
Nimbus Maze
Overgrown Tomb
Petrified Field
Plains
Plateau
Polluted Delta
Reflecting Pool
Sacred Foundry
Savannah
Scalding Tarn
Scrubland
Steam Vents
Stomping Ground
Strip Mine
Swamp
Taiga
Temple Garden
Terramorphic Expanse
Tolaria West
Tropical Island
Tundra
Underground Sea
Urborg
Verdant Catacombs
Vesuva
Volcanic Island
Volrath's Stronghold
Wasteland
Watery Grave
Windswept Heath
Wooded Foothills
Yavimaya Hollow
Zoetic Cavern

Basically, pain lands have been outed for shock duals. City and GC out for Forbidden and Exotic Orchard. There was too much pain before. It was fast, but hurt too much and let to too much early game disadvantage.