True Force

The True Force is the form that the Triforce takes upon being reunited by the one with an unbalanced heart who made a wish on it. It is first mentioned by Zelda in Ocarina of Time, in the future, upon revealing the second half of the Triforce's legend. To date it has yet to be seen in a Zelda game or mentioned again.

Based on the description of a maiden in A Link to the Past however, it can be inferred that she is speaking about the True Force, since Ganon does not have a perpetual reserve of Triforce wishes in that game. This contradicts the notion posited by Hyrule Historia.

A counter-argument has been brought up that the True Force might only grant the wishes made by its combiner, as long as he or she live. However this is only speculative, and doesn't match the context that Ganondorf is said to have wished on the Triforce hundreds of years ago.