{T}: Add {C}. Whenever you cast a colorless spell with mana value 7 or greater, you may sacrifice Sanctum of Ugin. If you do, search your library for a colorless creature card, reveal it, put it into your hand, then shuffle.
![Sanctum of Ugin - [Foil] Battle for Zendikar (BFZ)](http://cdn.shopify.com/s/files/1/0147/6729/2516/products/86798d03-9f2d-46bd-a660-13c8dd5535ce_90d39944-e782-444c-8c0f-ff2161832aab_{width}x.jpg?v=1636256136)
![Sanctum of Ugin - [Foil] Battle for Zendikar (BFZ)](http://cdn.shopify.com/s/files/1/0147/6729/2516/products/86798d03-9f2d-46bd-a660-13c8dd5535ce_90d39944-e782-444c-8c0f-ff2161832aab_530x@2x.jpg?v=1636256136)