MTG
Blue Mana Battery (German) - "Blaue Manabatterie"
Artifact
2T: Put one counter on Blue Mana Battery.T: Add U to your mana pool. Remove as many counters as you wish. For each counter removed add U to your mana pool. This ability is played as an interrupt.
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Blue Mana Battery (French) - "Accumulateur de mana bleu"Bog Imp (French) - "Diablotin des marecages"