Choose two target creatures controlled by the same opponent. That player chooses and sacrifices one of those creatures. Put a -1/-1 counter on the other.
The player chooses which one to sacrifice as Retribution resolves. If only one of the targets is still legal at that time, then the player must choose that one to sacrifice.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
