Black Fortress

{t}: Add {b}{b} to your mana pool.
{t}: Add {w}{w} to your mana pool.
{t}: Add {u}{u} to your mana pool.
{t}: Add {r}{r} to your mana pool.
{t}: Add {g}{g} to your mana pool.

{b}{r}{t}: Search your library for a dragon creature card and put it into your hand.

Dragon spells you cast cost {3} less.