Blue Mana Battery
Description
2, TAP: Put one counter on Blue Mana Battery.
TAP: 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.
TAP: 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.