Besiege the Divide

As Besiege the Divide enters the battlefield,
choose Reclamation or Corruption:
* Reclamation - As long as you have five or fewer
land cards in your graveyard, you can't lose the
game. Choose this option only if you spent green
mana to cast Besiege the Divide.
* Corruption - At the beginning of each upkeep,
each player with ten or more land cards in their
graveyard loses the game. Choose this option
only if you spent blue mana to cast Besiege the
Divide.