Deep Water

Enchantment, UU (2)
{U}: Until end of turn, if you tap a land you control for mana, it produces {U} instead of any other type.¹
Illus. Jeff A. Menges

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Deep Waters affects lands you control when it resolves and any lands you gain control of this turn.
• 8/1/2008: The amount of mana produced is unchanged, but it will all be {U}.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/2)	The Dark (Common)