Maybe:
Archaeomancer
Chain of Vapor
Cryptic Command
Deadeye Navigator
Disallow (AER)
Drowner of Hope + Eldrazi Displacer (Skycloud Expanse -> Mystic Gate)
Momentary Blink
Sphinx's Revelation
Venser, Shaper Savant
Any rock that taps for {U} (Commander's Sphere, Darksteel Ingot, Meteorite, Ojutai Monument)
Maybe:
Archaeomancer
Chain of Vapor
Cryptic Command
Deadeye Navigator
Disallow (AER)
Drowner of Hope + Eldrazi Displacer (Skycloud Expanse -> Mystic Gate)
Momentary Blink
Sphinx's Revelation
Venser, Shaper Savant
Any rock that taps for {U} (Commander's Sphere, Darksteel Ingot, Meteorite, Ojutai Monument)