Savage Dispute

Primal {1}{r}{g} (You may cast this spell for its
primal cost. Spend only mana produced by basic lands
to pay this cost.)
Choose target creature you control and target
creature you don`t control. If this spells primal
cost was paid, the creature you control gets
+1/+1 for each land card in your graveyard until
end of turn. Then those creatures fight each
other. (Each deals damage equal to its power to the
other.)