Jace's Erasure(Budget)

with high tide and walking atlas this deck can have crazy fast mana, like 10 mana on turn four for a replication win. doppelganger has great synergy with every other creature in this deck and can be used several times in a turn. an example would be having jace with 5, a mill ally and a doppelganger in play and have 5 islands. first high tide, tap for 8 blue with the remaining four islands, play a walking atlas doppelganger copies it and has no summoning sickness, tap doppelganger to play a land, play gilder bairn and copy with doppelganger, doppelganger is already tapped, pay to untap and use the effect to boost your jace to 10 and sack him to mill 20. also kicked replication on a mill ally will win the game, and ashnods transmogrant lets you copy artifact mill ally or even doppelganger.