The global ability of Darkseid Erasure from the Batman set is:
Global: Pay (1). Move a die from your Prep Area to your Used Pile. Then, draw a die from your bag and add it to your Prep Area.
I have a spare energy in my pool, and my Prep Area is currently empty. Can I use it, so I have no dice in Prep to be moved to Used, and then draw a die and add it to Prep, or the inability to fulfill the first part prevents me from using it altogether?