- If I have less than 4 energy cards in my discard pile, can I play "Energy Returner"?
- Only if you have at least one energy in your discard. If you have less than 4 energy, return all of them to your deck.
Source:
Unleashed FAQ (2010-05-13), PUI Rules Team (2010-05-13)
Relevant cards
Note: All applicable cards may not be listed below.