Green Mana Battery (REN) (#145)

Name: Green Mana Battery
Mana Cost: {4}
Type: Artifact
Collector Number: 145
Oracle Text: {2}, {T}: Put a charge counter on Green Mana Battery. {T}, Remove any number of charge counters from Green Mana Battery: Add {G}, then add an additional {G} for each charge counter removed this way.
Rarity: uncommon
Artist: Christopher Rush