Urza's Legacy: Crop Rotation
As an additional cost to cast Crop Rotation, sacrifice a land.
Search your library for a land card and put that card onto the battlefield. Then shuffle your library.
Fetching for lands that don't have basic land types costs a hefty price of one green and sacrificing a land. In Legacy and Pauper, Crop Rotation is used to search up some powerful utility lands or intense mana ramp, like Gaea's Cradle, Dark Depths, Bojuka Bog, or any of the "UrzaTron" lands.