Upwelling

Enchantment, 3G (4)
Mana pools don't empty as steps, phases, or turns end.¹
Once again, Kamahl felt the full force of the Mirari's pull, but he had learned much since the last time.
Illus. John Avon

Gatherer Card Rulings [Nov 2009]

• 10/1/2009: Players can keep mana in their pool indefinitely while this is on the battlefield, but once it leaves the battlefield, they have until the end of the current step (or phase) to use the mana before it disappears.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (2/15)	Tenth Edition (Rare) Scourge (Rare)