At the beginning of each player's end step, put a charge counter on Mana Cache for each untapped land that player controls.
Remove a charge counter from Mana Cache: Add . Any player may activate this ability but only during their turn before the end step.
At the end of each player's turn, put a charge counter on Mana Cache for each untapped land that player controls.
Remove a charge counter from Mana Cache: Add one colorless mana to your mana pool. Any player may play this ability but only during his or her turn before the end phase.
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