Barad-Dur tower

{t}Add {b}{b},or {b}{r} or {r}{r} to your mana
pool.
Discard a card. Look the top three cards on top
of your library then put them on top of your
library in any order, the draw a card. If you have
no cards into your hand, you may pay 1 life to
use this ability.
When a legendary creature called Sauron, the
dark lord it's removed from play, remove
Barad-dur tower from play