As Swirl the Mists enters the battlefield, choose a color word.
All instances of color words in the text of spells and permanents are changed to the chosen color word.
12/1/2004 This effect lasts as long as Swirl the Mists is on the battlefield. It ends as soon as Swirl the Mists leaves the battlefield.
12/1/2004 Swirl the Mists’ ability also affects spells that are cast and permanents that enter the battlefield after Swirl the Mists enters the battlefield.