[Standard] Abzan Blue

[mastertransmuter]

Abzan Blue

A non-traditional Abzan build utilizing both Blue and Colorless mana sources, spells, and abilities.  Eldrazi Displacer, Reflector Mage, and Siege Rhino provided the foundation for this deck.  I am choosing to keep Anafenza, the Foremost in the sideboard, even though she is a staple of the archetype.  Dromoka's Command, Murderous Cut, and Stubborn Denial round out your non-creature spells, along with Gideon, Ally of Zendikar.

Any suggestions for when Warden of the First Tree rotates out?  Another card with an enters the battlefield ability would be ideal.