Oracle Text

Transfigure 1BB (1BB, Sacrifice this creature: Search your library for a creature card with the same converted mana cost as this creature and put that card onto the battlefield. Then shuffle your library. Transfigure only as a sorcery.)

Card Rulings

5/1/2007 Transfigure is similar to Transmute, though it can be activated only if the permanent with Transfigure is on the battlefield, and it can fetch only a creature.