![Tap](/Handlers/Image.ashx?size=small&name=tap&type=symbol)
: Add
![1](/Handlers/Image.ashx?size=small&name=1&type=symbol)
to your mana pool.Whenever you cast a colorless spell with converted mana cost 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 your library.