4 Oct 2004
Will not affect lands that do not produce mana.
4 Oct 2004
Although the color may be altered, any restrictions on the use of the mana are not removed.
1 Oct 2008
This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.
23 Aug 2016
Any colorless mana that's produced isn't affected.