Mana pool

From MTG Salvation Wiki

From the Comprehensive Rules Mana Pool When an effect creates mana, that mana goes into a player’s mana pool. From there, it can be used to pay for spells and abilities. The mana can be used immediately to pay a cost, or stored in the mana pool for use later in the phase. The mana pool is cleared at the end of each phase.

See also: Mana burn.