Sorcery, 2GG (4)
Rare
Sacrifice any number of lands. Search your library for that many land cards, put them onto the battlefield tapped, then shuffle your library.
"Changes far greater than the turning of the leaves await us at season's end."
—Colfenor, the Last Yew
Illus. Fred Fields

4/1/2008: You sacrifice the lands as part of the resolution of Scapeshift. It isn't an additional cost.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern