If I use Ezreal's signature spell to banish and replay my only unit on a battlefield, can I replay it to that same battlefield, or does the battlefield become uncontrolled when the unit is banished?

Ruling: You cannot replay the unit to that battlefield. You only control a battlefield while you have units there, so when you banish your only unit, you lose control of the battlefield before you can replay the unit.

Sequence:

• You banish your only unit from the battlefield
• The battlefield becomes empty and you no longer control it
• You cannot play the unit back to that battlefield since you don't control it