The Hooded Nest

The Hooded Nest enters the battlefield tapped
unless you control one Plain and one Swamp.
At the beginning of your upkeep, if you control 3
Plains, search your library for a Plain and put it
onto the battlefield. Then shuffle your library.
{t}: Add {w} or {b} to your mana pool.
"Home of the Radiant Church, a place where
clerics practice their divine magic."