Text (DK+errata): {U}: Until end of turn, if you tap a land you control for mana, it produces {U} instead of any other type. [Oracle 2007/10/01]
All affected lands produce just one blue mana regardless of how many it might normally generate. [Duelist Magazine #3, Page 7]
Mana Flare will provide one extra blue mana. [Duelist Magazine #3, Page 7]
Will remove restrictions on how mana generated by the land is used. [Duelist Magazine #6, Page 131] For example, the blue mana from a Mishra's Workshop can be used for any purpose.
It affects lands you control when it resolves and any lands you gain control of this turn. [D'Angelo 1999/08/18]
Extended tournaments (see Rule 913) have banned this card since 1999/10/01.
