Asteroid M

{t}: Add {b} to your mana pool.
Magneto has Indestructible and can't be exiled
from the game, while Asteroid M remains in play.
If Asteroid M is ever removed from play, search
your deck for another legendary land named
Utopia put it in play then shuffle your deck.
Asteroid M is the name of any orbital space station
created by the mutant terrorist Magneto.