Pit Fight

Oracle Text

Target creature you control fights another target creature. (Each deals damage equal to its power to the other.)

Card Rulings

1/24/2013 The second target of Pit Fight can be another creature you control, but it can’t be the same creature as the first target.
1/24/2013 If either target of Pit Fight is an illegal target when the ability tries to resolve, neither creature will deal or be dealt damage.