Ruinous Necropolis

{t}: Add one mana to your mana pool of any color
a nonbasic land you control could produce. If you control no other nonbasic lands, add {c}.
{2}{ut}: Search your library for a nonbasic land, put
it on the battlefield tapped, then shuffle your
library.
A history unknown, a story untold, it resides with the wraiths in hollow silence. The granite worn, the rooms unclean, a magical presence lurks inside it.