Sanctum of Ugin 242/274 (Battle for Zendikar)

{T}: Add {C}. Whenever you cast a colorless spell with mana value 7 or greater, you may sacrifice this land. If you do, search your library for a colorless creature card, reveal it, put it into your hand, then shuffle.

NM - $4.40
LP - $3.50
MP - $2.60
HP - $1.80
DMG - $1.50