Name:Black Mana Battery
ManaCost:4
Types:Artifact
A:AB$ PutCounter | Cost$ 2 T | CounterType$ CHARGE | CounterNum$ 1 | SpellDescription$ Put a charge counter on CARDNAME.
A:AB$ Mana | Cost$ T SubCounter<X/CHARGE> | References$ X,Y | Produced$ B | Amount$ Y | CostDesc$ {T}, Remove any number of charge counters from CARDNAME: | SpellDescription$ Add {B} to your mana pool, then add an additional {B} to your mana pool for each charge counter removed this way.
SVar:Y:Number$1/Plus.ChosenX
SVar:X:XChoice
#ChosenX SVar created by Cost payment
SVar:RemRandomDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/black_mana_battery.jpg
Oracle:{2}, {T}: Put a charge counter on Black Mana Battery.\n{T}, Remove any number of charge counters from Black Mana Battery: Add {B} to your mana pool, then add an additional {B} to your mana pool for each charge counter removed this way.