Deep Water — ruling 1

The amount of mana produced is unchanged, but it will all be {U}.

Deep Water — ruling 2

Deep Waters affects lands you control when it resolves and any lands you gain control of this turn.

Deep Water : règles, fonctionnement et interactions (MTG)

Deep Water is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

: Until end of turn, if you tap a land you control for mana, it produces instead of any other type.

How it works : Deep Water

Original English text — Wizards of the Coast / Scryfall

#1August 1, 2008· Wizards of the Coast
The amount of mana produced is unchanged, but it will all be .
No other card is named in this ruling.
#2October 4, 2004· Wizards of the Coast
Deep Waters affects lands you control when it resolves and any lands you gain control of this turn.
No other card is named in this ruling.