Cathedral of the Spark

Cathedral of The Spark enters the battlefield
tapped unless you pay 3 life.
{t}: Add {c}{c} to your mana pool.
{5}, {t}: Search your library for a colorless
creature card, and put it into your hand.
This is one of many temples hidden within the
astral plane, only the strongest mages can ever
hope to reach it.
— Raphael Beaumont