Fortress in the Mountains

Fortress in the Mountains enters the battlefield tapped, unless you control a swamp or island.
{t}: Add {u}{u}, {u}{b} or {b}{b} to your manapool. Fortress in the Mountains doesn`t untap during
your next untap step.
Whenever you tap Fortress in the Mountains for
mana, you may search your library for a Castle
card except Fortress in the Mountains and put it
onto the battlefield.