Ulamog, Liberator of Existence

When you cast this spell, destroy two lands for each opponent.
Indestructible, Incomprehensible 2, Annihilator 1, Obliterate 1. (This creature cannot be blocked by creatures with converted mana cost 2 or less, when this creature attacks, defending player sacrifices 1 permanent, when this creature attacks, destroy target land defending player controls.)
Whenever a land you don't control taps for colored mana, destroy that land.
Lands have "{t}: add {c}"